Old French cail

← Gaulish cagiíum (mention)

← Proto-Celtic *kagyom (mention)

← Welsh cae (cognate)

→ English quay (mention)

→ Middle English keye (mention)

→ Faroese kai (mention)

→ French quai (inherited)

→ Norwegian Bokmål kai (mention)

→ Norwegian Nynorsk kai (mention)

→ Portuguese cais (derived)

→ Swedish kaj (mention)