Deosil is brought to you by Mark W. Law & Miss Frieda
November 08, 2026
Genealogy Utility

Common Ancestor Finder

Load a GEDCOM file, pick any two people in it, and see exactly how — and through whom — they’re related.

Load your GEDCOM file

Click to choose a file or drag a .ged file here

Nothing leaves your browser — the file is parsed locally and never uploaded.

No file loaded yet.

Your file stays on your device. Closing this page (or clicking Clear) discards everything.

Choose two people

Result

Relationship terms follow standard English genealogical convention (Nth cousins, removals, and great-/grand-ancestor lines). If two people share no blood ancestor, the tool also checks whether either is married to a blood relative of the other and reports that connection instead.