Manx jiass

← Proto-Celtic *dexswos (inherited)

← Irish deas (cognate)

← Scottish Gaelic deas (cognate)

← Proto-Indo-European *deḱswo- (inherited)

← Proto-Indo-European *deḱs- (mention)

← Old Irish dess (inherited)

→ Welsh de (cognate)

→ Cornish dyghow (cognate)