Where does “Le Pen” come from?

Le Pen (French) comes from Breton penn, from Middle Breton penn, from Old Breton penn, from Proto-Brythonic penn, from Proto-Celtic kʷennom — head.

Ancestry of “Le Pen”, step by step

Le Pen traces back through two separate lines of ancestry.

via Breton penn

StepLanguageWordMeaning
1Bretonpennhead; chief, leader
2Middle Bretonpenn
3Old Bretonpenn
4Proto-Brythonicpennhead
5Proto-Celtickʷennomhead

via French

StepLanguageWordMeaning
1Frenchbreadth, width; strip, length
2Frenchmoinemonk
3Middle Frenchmoinemonk
4Old Frenchmoniemonk
5Latinmonicussporadically attested in early Christian inscriptions from Gaul

Words derived from “Le Pen

Every word from Proto-Celtic kʷennomEvery word from Proto-Brythonic pennEvery word from Old Breton penn