Welsh cyll

← Proto-Brythonic *koll (inherited)

← Proto-Celtic *koslos (inherited)

← Irish coll (cognate)

← Old Welsh coll (inherited)

← Middle Welsh coll (inherited)

→ Welsh Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch (mention)

→ Welsh prysgyll (compound)

→ Irish coll (cognate)

→ Scottish Gaelic coll (cognate)

→ Manx coull (cognate)

→ Old Irish coll (cognate)