Pretty sure you're asking whether the name shouldn't be in the nominative case instead. The answer is, basically any word is inflected in Russian, with some exc

Pretty sure you're asking whether the name shouldn't be in the nominative case instead. The answer is, basically any word is inflected in Russian, with some exceptions where the dative case can be identical to the nominative—and even such words can be quite naturally bent into the different cases, in casual speech. The ‘nationality’ of the name doesn't matter, though foreign names or words may initially not be assimilated in the language enough for the inflections to be established and accepted. One example of a case when the dative form would be the same as the nominative, is if the recipient was a Mrs. Zuckerberg, since this specific kind of the last name isn't inflected when it's of the feminine grammatical gender. There's also the dubious trend of avoiding inflection of brand names for any and all purposes—but that's just contrary to how Russian works, and is dictated instead by whims of marketing people who lack the sense for the language.