88%RatingSave Gender Masculine Usage Ancient Greek [1], Greek Scripts Ἀδαμάντιος(Ancient Greek) Αδαμάντιος(Greek) Meaning & History Derived from Greek ἀδάμας (adamas) meaning "unconquerable, unbreakable, adamant" (genitive ἀδάμαντος). Related NamesFamily Tree·Details RootadamasFeminine FormAdamantia(Greek) Categories strength, success, victory, wildness Sources & References Lexicon of Greek Personal Names, available from https://search.lgpn.ox.ac.uk/browse.html?facet-nymRef=Ἀδαμάντιος.