Welsh pedair

← Proto-Celtic *kʷetesres (inherited)

← Proto-Indo-European *kʷétesres (inherited)

← Proto-Indo-European *kʷetwóres (mention)

← Cornish peder (cognate)

→ Breton peder (cognate)

→ Welsh pedr- (link)

→ Welsh pedry- (link)

→ Welsh un deg pedair (compound)

→ Welsh pedair ar ddeg (compound)

→ Welsh pedair ar bymtheg (compound)

→ Welsh dau ddeg pedair (compound)