Erwan is a masculine French-Breton given name. Notable people with the name include:
Erwan Bergot (1930–1993), French Army officer and writer
Erwan Berthou (1861–1933), French poet, writer and bard
Erwan Bouroullec (born 1976), French designer. See Ronan & Erwan Bouroullec
Erwan Pain (born 1986), French ice hockey player
Erwan Quintin (born 1984), French footballer
Erwan Vallerie (born 1944), French economist and Breton nationalist