A lineage is a single documented line of descent: you, a parent, a grandparent, and so on, one link per generation, as far back as the record reaches. It's the thread — while a family tree is the whole fabric: every line at once, branching and doubling with each generation. A pedigree is simply the chart that displays those direct lines, the format borrowed from centuries of recorded descent.

The doubling — and why deep research is hard

You have two parents, four grandparents, eight great-grandparents. Every generation back, the number of direct ancestors doubles: ten generations back — roughly the late 1600s for most American families — the chart holds over a thousand positions. This is why a documented family history is genuinely substantial work: each of those positions is a person whose existence, parents, and dates have to be established from records, one document at a time. (Far enough back, the same person starts to occupy multiple positions — distant cousins married more often than families remember — which is why the deep chart eventually narrows rather than doubling forever.)

Direct line and collateral family

Your direct ancestors are the people you literally descend from. Everyone else in the tree — the siblings of your great-grandmother, their children, the cousins — is collateral family. Collaterals aren't clutter: their records regularly solve problems the direct line can't. A great-great-uncle's death certificate may name the parents that your own ancestor's records never mention. Careful research reads the whole family to prove the single line.

What documents a lineage

  • Civil registration — government birth, marriage, and death records.
  • Censuses — households captured in place and time, every decade.
  • Church and synagogue books — baptisms, marriages, and burials, often reaching centuries before civil records begin.
  • Land, probate, and court records — where relationships are stated because property depended on them.
  • Immigration and military records — the moves and the service that fixed people in the historical record.

Each generational link in a documented lineage rests on records like these — never on another family tree's say-so.

How far back can a lineage go?

It depends almost entirely on where your family lived and what survived. For most American lines, the early 1800s is reachable with care; colonial lines can extend into the 1600s; and a line that connects into families whose descent was recorded for legal or noble reasons can sometimes be followed into the medieval record. That last kind of depth is rarer than the internet suggests — but real when the documents support it, and a serious researcher will tell you which of your lines can go deep before you commit. That's exactly what Sapling's free assessment is for, and our packages are priced by that depth: the early 1800s, the colonial 1600s, or as far as the record reliably goes.

Why document it at all

An undocumented family story shifts a little with every telling. A documented lineage is different in kind: it fixes the names, the places, and the evidence, so what passes to your children is history rather than hearsay — the stories kept, and the proof kept with them. That's the entire premise of what we make: a written, sourced, interactive family history built to be handed down. You can see one in full in our sample report.

Sapling.Family is a family-history research service led by Professor Cisco Bradley. New to research? Start with how to begin genealogy research, or read how to hire a professional genealogist.