Proto-Celtic *ɸlitanos

→ Breton ledan (inherited)

→ Welsh llydan (inherited)

→ Welsh Llydaw (mention)

→ Irish leathan (inherited)

→ Irish leithead (derived)

→ Scottish Gaelic leathann (inherited)

→ Manx lhean (inherited)

→ Cornish ledan (inherited)

→ Old Irish lethan (inherited)

→ Old Armenian լայն (cognate)