Etymon
ll-ittus-old-french-et-old-french-brunet-protoindoeuropean-h2-protoindoeuropean-eh2-protoitalic-a-latin-am-old-french-e-old-french-brunete-french-brunettebor
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.