Proto-Celtic *kʷennom

→ English pendragon (derived)

→ Breton penn (inherited)

→ Welsh pen (inherited)

→ Welsh arbennig (mention)

→ Irish ceann (inherited)

→ Irish airchinneach (mention)

→ Scottish Gaelic ceann (inherited)

→ Galician pena (derived)

→ Manx kione (inherited)

→ Italian arpento (mention)

→ Cornish penn (inherited)

→ Middle Irish cenn (inherited)

→ Old Irish cenn (inherited)

→ Middle Welsh penn (inherited)

→ Cumbric pen (inherited)