Genogram Symbols and Meanings: The Complete Visual Key (2026)

Most symbol charts treat a genogram like a sticker sheet: forty icons in a grid, memorize and go. That approach breaks the first time you try to read a real family map, because a genogram only works when the symbols, the lines, and the layout are read together as one system.

This guide walks through every major genogram symbol category in the order you would actually draw them: people first, then relationships, then emotional bonds, then family structure, then medical and death markers. By the end you will be able to read a completed genogram the way a family therapist or genetic counselor does, and not just recognize individual shapes.

What Genogram Symbols Actually Represent (and Why Placement Matters)

A genogram is not a family tree with better graphics. A family tree records who is related to whom. A genogram records that, plus the quality of each relationship, plus repeating patterns across generations. That extra layer is why the symbol system exists at all.

Symbols vs. lines vs. layout: three layers of meaning

Every genogram communicates through three separate visual layers, and misreading one for another is the most common mistake beginners make.

• Symbols (squares, circles, diamonds) identify individual people and basic facts like sex, age, and life status.
• Lines connect people and describe the structural relationship between them: marriage, divorce, cohabitation, parent-child.
• Layout (generation rows, left-to-right birth order, physical distance between symbols) encodes information that has no dedicated icon at all, such as who is closest to whom in the family system.

According to the Bowen Center for the Study of the Family, which grew out of Murray Bowen's original family systems work, the point of mapping a family this way is to make multigenerational patterns visible rather than just recording names and dates.

The single rule that prevents 90% of misreadings

If you remember one rule, make it this: a symbol tells you who someone is, but a line tells you what the relationship is, and you cannot infer one from the other. A square next to a circle only tells you two people exist. It is the line between them, solid, dashed, slashed, or absent, that tells you whether they are married, separated, dating, or estranged. Beginners frequently read proximity or symbol size as meaningful when only the connecting line and its annotations actually carry that information.

Standard vs. clinical symbol sets

There are two related but distinct symbol traditions in circulation. Family therapy and social work genograms largely follow the conventions popularized by Monica McGoldrick, Randy Gerson, and Sueli Petry in their reference text on genogram construction, which emphasizes emotional relationship lines. Medical and genetic counseling pedigrees follow a more clinical standard, documented in resources like the National Society of Genetic Counselors, which prioritizes precise health and inheritance data over emotional nuance. Most consumer genogram tools, including GenoPro, Lucidchart, and SmartDraw, blend both traditions so a single chart can hold both.

Gender and Individual Symbols

Every person on a genogram starts as one of three base shapes, then gets annotated with dates, status, and life events.

Square (male), circle (female), diamond (unknown/nonbinary)

The square represents a male, the circle represents a female, and a diamond is used for a person whose sex is unknown or who does not fit the binary square-or-circle convention. Some modern tools also support a triangle or a combined square-circle symbol for nonbinary identification, though this is less standardized across platforms than the original two shapes.

Marking the index person and age/birth-death dates

The person who requested or is the subject of the genogram (called the index person or proband in clinical pedigrees) is typically marked with a double-lined square or circle, or an arrow pointing to their symbol. Age is written inside the shape, or birth year is written just above or beside it. When someone has died, a death year is added next to the birth year.

Pregnancy, miscarriage, abortion, and stillbirth symbols

These are the symbols most people have never seen before their first genogram:

• Pregnancy: a small triangle, sometimes with "P" written inside
• Miscarriage: a small circle or a triangle with a diagonal slash
• Stillbirth: a triangle connected directly into the sibling line with a slash
• Elective termination: an X or a triangle with a horizontal line through it

Because these symbols are sensitive and vary between tools, many clinicians recommend adding a short written note next to any pregnancy-loss symbol rather than relying on the icon alone.

Relationship Line Symbols: Marriage, Divorce, and Cohabitation

Relationship lines connect two individual symbols horizontally, and the line style is what actually carries the meaning.

Solid line (marriage) and dating/engagement variants

A solid horizontal line between two symbols indicates marriage, usually labeled with an "m." and the marriage year. A dashed horizontal line typically represents cohabitation or a committed but unmarried relationship. Dotted or lighter lines are sometimes used for dating or engaged couples who have not yet married or moved in together, though this variant is less consistently standardized than marriage and divorce lines.

Single and double slashes: separation vs. divorce

This is the pairing that trips up the most people:

• One slash (/) through the marriage line signals separation
• Two slashes (//) through the marriage line signals divorce

The direction and count of the slashes is the only thing distinguishing "still legally married but living apart" from "legally divorced," so it is worth double-checking on any chart you did not draw yourself.

Cohabitation, remarriage, and stacking multiple partnerships

When someone has more than one significant partnership over time, each relationship gets its own horizontal line, stacked vertically in chronological order below the person's symbol, with the earliest relationship on top or bottom depending on the tool's convention. Remarriage after divorce is drawn as a new solid line to a new partner, positioned so the divorced line and the new marriage line are both visibly connected to the same person.

Emotional Relationship Symbols: The Layer Most People Skip

This category is what separates a genogram from a plain family tree, and it is the layer beginners most often leave out entirely.

Close, distant, cutoff, and fused bonds

Emotional bond lines are drawn between two people (often below or alongside the structural relationship line) using distinct patterns:

• Close relationship: a single straight line
• Very close/fused relationship: two or three parallel lines
• Distant relationship: a dashed line
• Cutoff relationship: a solid line with hash marks or a broken gap in the middle

Conflict, hostility, and abuse indicators

Conflict is typically drawn as a jagged or zigzag line, sometimes doubled for severe or ongoing conflict. Abusive relationships are often marked with a zigzag line combined with an arrow pointing from the person exerting harm toward the person experiencing it. Because these markers can carry real weight for the people being mapped, most clinical guidance suggests using them only when the information is confirmed, not inferred.

Combining bonds (e.g., close-hostile) without clutter

Real relationships are rarely just one thing, which is why fused-conflictual bonds (very close but volatile, common in Bowen theory literature) are drawn as a combination: parallel lines for closeness plus a zigzag overlay for conflict. The practical rule for keeping a chart readable is to limit each relationship to one structural line plus at most one emotional line; if a relationship genuinely needs three or four qualifiers, a short text annotation next to the line communicates it more clearly than stacking symbols.

Build Your Own Genogram, Free Template & Symbol Key

Reading a symbol key is useful, but the fastest way to make it stick is to place the symbols on an actual family map.

Grab the printable symbol legend

Keep a one-page reference of the shapes and line styles above next to you while you draw your first chart. Most people only need to look up pregnancy-loss and emotional-bond symbols more than once or twice before they become second nature.

Start from a blank template

Rather than starting from a blank page, begin with a three-generation template and fill in symbols generation by generation, starting with grandparents at the top and working down. This keeps the layout consistent and prevents the layout errors (misaligned generation rows, inconsistent birth order) that cause more confusion than any individual symbol choice.

Three-generation quick-start checklist

Before you consider a first draft finished, confirm you have:

1. Correct base symbols (square, circle, or diamond) for every person
2. Birth years, and death years where applicable, on every symbol
3. A structural line (marriage, divorce, cohabitation) between every couple
4. At least one emotional-bond line for relationships you know well
5. Consistent generation rows, oldest generation at the top

You can build and export a chart using genogramcreator.com's own tools directly at Genogram Creator, which applies these same standard symbols automatically as you place each family member.

Medical and Genetic Symbols for Health Genograms

When a genogram is used for family health history rather than emotional patterns, the symbol set shifts toward clinical precision.

Shading and color-coding illnesses

Medical genograms (closer to what geneticists call a pedigree) commonly shade part or all of a symbol to indicate a diagnosed condition. A quarter-shaded symbol might represent one condition, a half-shaded symbol another, and a fully shaded symbol a third, with a legend defining each pattern for that specific chart. The National Human Genome Research Institute and organizations like the National Society of Genetic Counselors emphasize that a shading key must always accompany the chart, since shading patterns are not universally standardized the way basic sex symbols are.

Substance use, mental health, and hereditary conditions

Because a single symbol cannot hold multiple diagnoses clearly, most health-focused genograms use color-coding (one color per condition) layered on top of shading, plus a written legend listing what each color and shading pattern means. This is especially common for tracking hereditary conditions, substance use patterns, or mental health history across generations, where the goal is spotting a recurring pattern rather than diagnosing any one individual.

Building a medical legend that a clinician can read

A legend a clinician (or genetic counselor) can actually use should list, at minimum, each condition tracked, its corresponding shading or color, and the source of the information (self-reported, medical record, unconfirmed family history). The public CDC family health history resources recommend noting the reliability of each data point for exactly this reason: a family history genogram is only as useful as its weakest data source.

Death and Deceased Symbols

Death is one of the few genogram symbols with near-universal agreement across therapy, social work, and clinical pedigree traditions.

The X through a symbol and dating deaths

A diagonal line or X drawn through a square, circle, or diamond indicates that person has died. The birth year and death year are written together, usually as "b. [year], d. [year]" beside or below the symbol.

Cause of death and age annotations

When relevant, especially on medical genograms, a brief cause-of-death note is added next to the death symbol, along with age at death if it is not already obvious from the birth and death years. This detail matters most when a chart is being used to spot hereditary health patterns rather than purely relational ones.

Keeping deceased members in the emotional map

A common mistake is treating a deceased person's symbol as closed once the X is added, when in family systems terms their emotional-bond lines to living relatives often remain just as relevant. A parent who died decades ago can still show a fused or cutoff relationship line to an adult child, because the point of that line is documented emotional impact, not current contact.

Reading a Genogram as a System: Putting the Symbols Together

Once every individual symbol and line style is familiar, the real skill is reading them in combination across generations rather than one at a time.

Tracing patterns across three generations

Most useful genograms cover at least three generations, since patterns like repeated divorce, cutoff, or a particular hereditary condition are far easier to see across grandparent, parent, and current generation than in any single row. Read a completed chart top to bottom by generation first, then trace individual family lines down through it, rather than scanning left to right across unrelated branches.

Spotting triangles, cutoffs, and repeating cycles

In family systems theory, a triangle is a three-person emotional pattern, often one person caught between two others in conflict, and it shows up on a genogram as a set of emotional-bond lines connecting three people in a closed loop of closeness and conflict. Cutoffs (relationships marked as severed) that repeat across generations, such as several adult children in a row who cut off from a parent, are one of the most commonly cited patterns clinicians look for when reading a completed chart.

Common misreadings and how to avoid them

The errors that show up most often when people read genograms are:

• Treating a structural line (marriage/divorce) as if it describes emotional closeness
• Missing a slash mark and reading a divorce as a still-intact marriage
• Ignoring layout and generation alignment, which causes birth order and family branch confusion
• Assuming every genogram uses identical symbols, when clinical, therapy, and consumer tools each have minor variations

Cross-checking any unfamiliar chart against a legend, whether it is the standard set described in resources like Wikipedia's genogram overview or a tool-specific key from something like Creately, resolves most of these issues in seconds.

Frequently Asked Questions

What do the basic genogram symbols mean? A square represents a male, a circle represents a female, and a diamond represents an unknown or unspecified sex. Lines connecting these shapes describe relationships (marriage, divorce, cohabitation), and additional line styles layered onto those connections describe emotional closeness, distance, or conflict.

What is the difference between a divorce and a separation symbol? Both start from the same solid marriage line. One diagonal slash through the line indicates separation, while two diagonal slashes indicate divorce. The count of slashes is the only visual difference, so it is easy to misread quickly.

How do you show an emotionally close but conflicted relationship? Draw the standard structural line for the relationship type, then add a combined emotional-bond line: parallel lines to indicate closeness overlaid with a jagged or zigzag line to indicate conflict. If the combination becomes visually cluttered, a short text note next to the line is clearer than stacking more symbols.

What symbol is used for a deceased family member? A diagonal line or X drawn through that person's square, circle, or diamond indicates death, typically paired with birth and death years written beside the symbol.

How do you represent adopted or foster children on a genogram? Adopted children are usually connected to their adoptive parents with a dashed line instead of the solid line used for biological children, sometimes labeled "adopted" directly. Foster children follow a similar convention, often with a dotted line and a label distinguishing the foster relationship from a legal adoption.

Are genogram symbols standardized across therapists? Mostly, but not entirely. The core symbols (square, circle, diamond, marriage and divorce lines, death markers) are consistent across nearly every therapy and clinical tradition, largely thanks to the reference conventions established by McGoldrick, Gerson, and Petry. Emotional-bond lines, pregnancy-loss symbols, and medical shading conventions show more variation between individual clinicians and software tools, which is why any genogram worth sharing should include its own legend.

Conclusion

Genogram symbols are simple shapes on their own, a handful of squares, circles, diamonds, and line styles. What makes them powerful is reading them as a connected system: symbols identify people, lines define structural and emotional relationships, and layout reveals the multigenerational patterns that a plain family tree can never show. Once that system clicks, the same three-generation chart that looked like an intimidating grid of icons becomes a genuinely readable map of a family's history.