Etymon
en-fem-protoindoeuropean-bha-protogermanic-bo-protowest-germanic-bojo-old-english-boia-middle-english-boye-english-boy-english-femboy-english-dominantclip
A dedicated page for this root is on the way — it will gather every word descended from it, sibling forms across daughter languages, and a branching map of the family tree.