Proto-Celtic *wlikʷos

→ Welsh gwlyb (inherited)

→ Welsh gwlych (mention)

→ Welsh gwlith (mention)

→ Irish fliuch (inherited)

→ Scottish Gaelic fliuch (inherited)

→ Manx fliaghey (derived)

→ Manx fliugh (inherited)

→ Cornish gleb (inherited)

→ Cornish glyb (inherited)

→ Old Irish fliuch (inherited)