Turtledove combined real-life members of the Nazi party and from the Nazi German government into single characters. However, I also saw some resemblance of other people from these same characters. Perhaps it was an accidental side effect from Turtledove's writing. For example, even thought Jefferson Pinkard was supposed to be a Rudolf Höss analog, he reminded me of Amon Göth. I'm actually okay with McSweeney's name, because perhaps it's supposed to be ironic. Not every name has to sound scary. There was a time when the surname Hitler didn't even instill fear in the hearts of men. Oh, and he wouldn't have become Hitler, but more like an American Stalin. If we want to avoid strong parallelism, then McSweeney should keep his name as is.