Blended Family Tree Template (Divorce, Remarriage, Step-Family)

Standard family tree templates quietly assume one marriage per person and one set of children per couple. Real families frequently do not work that way, and the moment you add a divorce, a remarriage or a step-parent, the template stops fitting. The problems are both technical — where do the second marriage's children hang? — and human, because a chart that renders a step-parent as a dotted afterthought says something to the child who reads it. This page covers the drawing conventions that handle blended structures accurately, and the choices worth making deliberately rather than by default. To name any relationship you are unsure of, use the cousin calculator.

The one rule that matters most

Everything else follows from this.

Children hang from the union that produced them, not from a parent as an individual.

In a single-marriage family the distinction is invisible, because there is only one union.

In a blended family it is the whole thing. A person with two marriages has two horizontal partnership lines, and each child hangs beneath the correct one. Get that right and half-siblings, step-siblings and full siblings distinguish themselves automatically. Get it wrong — drop all the children under the parent — and the chart states that everyone is a full sibling, which is simply false.

This is why so many blended charts read as misleading rather than merely cluttered. It is not a cosmetic error.

Draw the partnership lines first, before any children, and check each child is attached to the right one. Two minutes of care at that stage saves redrawing the whole sheet.

Drawing divorce and remarriage

The standard conventions, which are shared with genogram notation.

A marriage is a horizontal line between two people, with the marriage year written above it.

A separation is one diagonal slash through that line.

A divorce is two diagonal slashes, with the divorce year written below.

A remarriage is a second horizontal line from the same person to a new partner, drawn to one side. Order marriages left to right chronologically — readers assume the first marriage is on the left.

Widowhood is not marked on the marriage line at all; the deceased spouse is marked as deceased in their own box, usually with a cross or a filled shape.

Cohabiting partnerships are drawn as a dashed horizontal line rather than solid, which lets you record an unmarried couple accurately without implying a marriage that did not happen.

Sideways relatives — the aunts, uncles and cousins each marriage brings in — follow the layout rules in extended family tree template.

Multiple remarriages stack sideways from the same person. Three marriages means three lines, and this is the point at which a chart usually needs redrawing with more horizontal room planned in.

Half-siblings, step-siblings and the difference

Worth being precise about, because the two are frequently confused.

Half-siblings share one biological parent. They appear on a descent chart naturally — two children hanging from two different marriage lines that share one person. No special notation is needed; the structure states it.

Step-siblings share no biological parent at all. Their parents married each other. There is no descent relationship between them, which means a strict family tree has nothing to connect them with.

That is a genealogical fact, not a social one. Step-siblings raised together from infancy are siblings in every way that matters day to day, and a chart that shows no line between them can feel like an erasure.

The usual solution is a household grouping — a dashed or shaded box drawn around everyone who lives together, cutting across the descent lines. It records the family as experienced without falsifying the descent.

Label it explicitly: "household, 2009–2021". That makes it a statement of fact rather than an ambiguous decoration.

Genogram notation handles this better than a family tree does, because it was designed for exactly this — the full symbol set is in genogram templates.

Adoption, fostering and donor conception

Situations a plain descent chart cannot express without a convention.

Adoption is conventionally shown with a dashed vertical line from the adoptive parents to the child, where a biological child has a solid line.

A child can carry both — a solid line to a birth parent and a dashed line to an adoptive one — where both are known and both are being recorded.

Whether to record the birth family at all is a genuine decision, not a default. For medical family history it matters. For a chart on a wall in the adoptive family's home it may not, and it may not be the adopted person's wish. Where the person concerned is old enough to have a view, that view should decide it.

Fostering is generally recorded in the household grouping rather than on the descent lines.

Donor conception varies with what the family wants recorded and what is known. Some charts mark it, some do not; there is no settled convention, so a legend is essential.

In all of these, the honest approach is the same: use a legend, state what the chart is recording, and do not imply certainty you do not have.

Layout: the practical problem

Blended structures are the hardest thing to fit on paper, and the reason is straightforward.

Each additional marriage adds width, because it needs its own partnership line and its own cluster of children beneath it.

A person with three marriages and children from each occupies roughly three times the horizontal space of a single-marriage person in the same generation, and everything beneath shifts sideways to accommodate it.

So plan the widest generation first. Sketch the structure in pencil with no names, find the row that spreads furthest, and lay the sheet out around that.

Put the person with multiple marriages towards the middle, so their marriages spread both ways instead of pushing everything to one side.

Consider landscape and A3 as a starting point rather than a fallback.

And expect to redraw. Almost no blended chart fits on the first attempt — the scaling problem is the same one covered in family tree templates for large families.

Who is this chart for?

The question that should come before any of the drawing decisions.

A chart for genealogical research prioritises accuracy of descent. Step-relations belong in notes; biological lines are what the chart records.

A chart for a child is a different document. If a step-parent has raised them, a chart that marks that parent with a dotted line and no box is going to communicate something the family probably does not intend. Include them properly, in the household grouping, with the same visual weight.

A chart for a family reunion is about recognition, not rigour — people want to find themselves on it.

A chart for medical family history needs biological lines only, and needs them accurate. That is one case where step-relations genuinely should be excluded.

These are not the same document, and trying to make one chart serve all four is why blended-family charts so often satisfy nobody. It is entirely reasonable to make two.

And ask the people on it. Someone's place in a family is not only a drafting decision, and a five-minute conversation prevents a chart that upsets a relative at a family gathering.

Which format handles it best

Genogram notation is the honest recommendation for a genuinely complicated family. It was developed in clinical settings precisely because standard trees could not represent real households, and it has established conventions for every situation on this page.

A written narrative is underrated. A page of prose — "Margaret married James in 1974; they had two children, Sarah and Thomas; after their divorce in 1989 she married David, who had a daughter, Emily, from his first marriage" — records everything a chart struggles with, unambiguously.

Many families end up with both: a chart for the wall and a page of notes for the detail. The wider format comparison is in family tree chart types.

Common mistakes

Hanging all children from one parent instead of from the correct union. The single most consequential error, because it misstates who is related to whom.

Using the same line style for step and biological relations, which is inaccurate.

Using a dotted line for a step-parent with no explanation, which reads as diminishment rather than notation.

Omitting a second marriage because it complicates the layout. If it produced children on the chart, it belongs on the chart.

No legend. Blended charts use more conventions than simple ones and need the key more.

Ordering marriages by importance rather than by date. Chronological, left to right.

Not asking the people involved how they want to appear.

Trying to make one chart serve research and sentiment. Make two.

And forgetting that a chart is read by the family, not only by you — the relationship-naming side of that is in family relationship chart and the printable formats in printable family tree.

FAQ

How do you show divorce on a family tree?

Two diagonal slashes through the horizontal marriage line, with the marriage year above and the divorce year below. A single slash indicates separation rather than divorce.

How do you show a second marriage?

Draw a second horizontal line from the same person to the new partner, placed to one side, with marriages ordered left to right by date. Each marriage's children hang beneath their own line.

Where do step-children go on a family tree?

Strictly, nowhere on a descent chart — they are not blood relatives. The usual approach is a dashed or shaded household box drawn around everyone living together, labeled with the years, which records the family as experienced without falsifying the descent.

How do you show half-siblings?

You do not need special notation. If each child hangs from the correct marriage line, half-siblings appear naturally as children of two different unions sharing one parent.

How is adoption marked on a family tree?

Conventionally with a dashed vertical line from the adoptive parents, where a biological child has a solid line. Whether to also record the birth family is a decision for the family, and for the adopted person where they are old enough to have a view.

What chart type works best for a blended family?

Genogram notation, which was designed for exactly this and has established conventions for divorce, remarriage, households and adoption. For very complicated families, a written narrative alongside a simplified chart often works better than any single diagram.

Draw the unions first, then decide who it is for

Blended families break standard templates because those templates assume one marriage per person. The fix is mostly one rule — children hang from the union that produced them, never from a parent alone — plus the standard conventions for divorce, remarriage and adoption, and a dashed household box for the step-relations a descent chart cannot express. Beyond the drafting, decide who the chart is for before you start: a research chart and a chart for a child are different documents, and it is entirely reasonable to make both. Use the cousin calculator whenever a relationship name is not obvious.