Welsh newydd

← Breton nevez (cognate)

← Proto-Brythonic *newɨð (inherited)

← Proto-Celtic *nouyos (inherited)

← Proto-Indo-European *néwos (inherited)

← Old Irish nuae (cognate)

→ English new (cognate)

→ Breton nevez (cognate)

→ Welsh Casnewydd (affix)

→ Welsh newyddiadur (suffix)

→ Welsh newydded (suffix)

→ Welsh newyddach (suffix)

→ Welsh newyddaf (suffix)

→ Irish nua (cognate)

→ Scottish Gaelic nuadh (cognate)

→ Manx noa (cognate)

→ Middle Irish núa (cognate)

→ Old Irish nuae (cognate)