Cymbeline

From Welsh Cynfelyn. from Proto-Brythonic *Kunobelinos (“Cunobeline”), meaning something like "strong as a dog," composed of:

*kuno- (“dog”), oblique/plural stem of *ki,

and *belino- (“strong”); cf. Breton Konvelen, from Proto-Celtic *belo- (“powerful, strong”), connected by Delamarre to Gaulish names like Belisama and Belenus, and ultimately from Proto-Indo-European *bʰel- (“to swell, be strong”).