Old Irish caín

← Proto-Celtic *kanyos (derived)

← Proto-Celtic *kanis (derived)

← Proto-Celtic *kanyos (mention)

← Welsh cain (cognate)

← Old Irish cain (mention)

→ Irish caoin (inherited)

→ Irish caoin (mention)

→ Irish caoine (mention)

→ Irish caoineas (mention)

→ Scottish Gaelic caoin (mention)