Welsh ieuanc

← Proto-Brythonic *jowank (inherited)

← Proto-Celtic *yowankos (inherited)

← Welsh ifanc (doublet)

← English young (cognate)

← Proto-Indo-European *h₂yuh₁n̥ḱós (inherited)

→ Welsh ifanc (doublet)

→ Welsh ieuenctid (affix)

→ Irish óg (cognate)

→ Scottish Gaelic òg (cognate)

→ Manx aa (cognate)

→ Manx aeg (cognate)

→ Old Irish óc (cognate)