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Contributor Contrib.Erin on 7/21/2010
From Greek Βελισάριος (Belisarios), probably of Illyric origin. This was the name of a famed Byzantine general and war hero who served the emperor Justinian. He was possibly of Slavic ancestry which has led to speculation that the name derives from Slavonic Beli-tzar "white prince" (the -sarius element being interpreted as coming from the old Slavic word tsesar or tsesari, which was derived from Caesar, thus giving Belisarius a "princely" connotation), but this etymology has since been discounted as somewhat dubious.