Well, in French 'whore' is spelled putain /'put̃ɛ/. It's probably from pute 'girl' which is cognate with Italian putto whence English putti, those Baroque cherubim. Volodya's name is pronounced /ˈputʲɪn/. It's most likely a humorous coincidence. FWIW, Putin's grandfather was Lenin's (and Stalin's) cook, and his wife speaks fluent German.