FeraItalian Probably related to modern Italian fiero "fierce, savage, raging; bold, daring; proud", by way of Latin ferus "wild, fierce; untamed" or fera "wild beast".
NanningaFrisian, Dutch, German Derived from the given name Nanne, a short form of Germanic names containing the element nand meaning "daring, brave, courage"... [more]
UljasEstonian Uljas is an Estonian surname (and masculine given name) meaning "daring" and "valiant".