Old French chesne

← Gaulish cassanos (derived)

← Old French fraisne (mention)

← Old French fresne (mention)

← Latin casnus (mention)

← Occitan casse (cognate)

→ English Duchesne (mention)

→ English Cheyne (derived)

→ French chêne (mention)

→ Middle French chesne (derived)

→ Norman tchêne (cognate)

→ Occitan casse (cognate)