Biliūnas

In one other case, perhaps the suffix -ūnas is a derivative from Bilỹs, Bi̇̀lius (see) or the like, but mostly, apparently, with the suffix -ūnas it is made from bi̇̀lti „byloti, kalbėti“ (LKŽ I 821), cf. bilū̃nas „kas bilus, kalbus“. In the latter case, the suffix accusative can be unified according to other surnames with the patronymic suffix -ū́nas.