medyc (meddyg) => medygon (m) : physician
cenaw => cenawon (m) : whelp
lleidr => lladron (m) : robber
mab => meibyon (meibon, m) : Sohn
dyn => dynyon (deneon, m) : man
gelyn => gelynyon : enemy
Plural mit -on, -ion
Strachan, Introduction, § 27c