What’s in a name? Enough to spark Prince Harry and Meghan Markle’s latest showdown with the queen! On Jan. 31, a U.K. paper suggested that Meghan removed her given name from son Archie’s official birth certificate a month after his May 2019 arrival — leaving only “Her Royal Highness, the Duchess of Sussex” — in a subtle, bureaucratic burn against Kate Middleton (whose full names are on her kids’ docs, like a commoner!). A spokesperson for Harry, 36, and Meghan, 39, quickly clapped back: “The change of name on public documents in 2019 was dictated by the Palace,” they insisted in a statement. “To suggest that she would oddly want to be nameless on her child’s birth certificate, or any other legal document, would be laughable were it not offensive.”…