Welsh credu

← Proto-Brythonic *krėdid (inherited)

← Proto-Celtic *kreddīti (inherited)

← Proto-Indo-European *dʰeh₁- (root)

← Proto-Indo-European *ḱréddʰh₁eti (inherited)

← Proto-Indo-European *ḱḗr (mention)

← Proto-Indo-European *dʰeh₁- (mention)