Erwan (Breton pronunciation: [ˈeʁwãn]) is a masculine Breton given name, sometimes spelled Erwann. Its francization is the French given name Yves.
From Old Breton given name Eudon. It might thus be formed of Proto-Brythonic words eu- "well, good" and *don "talent, natural gift, ability" (compare Welsh dawn and Irish dán), or derived from Gaulish name Esugenos.
Sometimes allegedly supposed to come from the Breton word aerouant "dragon" because of homophony in Modern Breton.[citation needed]
Notable people with the name include: