Irish réidh

← Breton rouez (cognate)

← Proto-Celtic *rēdis (inherited)

← Welsh rhwydd (cognate)

← Proto-Indo-European *h₁réh₁-dʰi (derived)

← Proto-Indo-European *h₁réh₁ (mention)

← Old Irish réid (inherited)

→ Welsh rhwydd (cognate)

→ Irish réiteach (mention)

→ Irish réitigh (link)