A Nabob Sidebar: Potato, PoTAHto

I should've mentioned this earlier, but I also found a British edition of Nabob on Google Books a few days ago, but what's all this then? AN Hungarian Nabob? I suppose that goes back to a previous point: when it comes to language, there's English and there's American. I blame Noah Webster, but that's mainly because I can't hang this one on George W. Bush.