Old Irish cóic

← Proto-Celtic *kʷinkʷe (inherited)

← Proto-Indo-European *pénkʷe (inherited)

→ Irish cúig (inherited)

→ Irish coicís (mention)

→ Irish cúigear (mention)

→ Scottish Gaelic còig (inherited)

→ Scottish Gaelic còigeamh (mention)

→ Manx queig (inherited)

→ Manx queiggey (mention)