Welsh oed

← Breton oad (cognate)

← Proto-Brythonic *oɨd (inherited)

← Proto-Celtic *aitom (inherited)

← Cornish ooj (cognate)

← Cornish oos (mention)

← Old Welsh oit (inherited)

← Middle Welsh oet (inherited)

→ Welsh oes (cognate)

→ Welsh erioed (compound)

→ Welsh oedolyn (compound)

→ Welsh oedi (suffix)

→ Welsh Oed Grist (compound)