There are still some “Hitlers” left in his old home town. If it were me, I’d change it...even just by replacing the “T” with another “L”. “Hiller” is not so bad.
My family’s last name is “White”, and two of my sisters were BUSSED to the Inner City during the worst of the Boston Bussing Fiasco. They were mercilessly bullied by the black kids, and bear the emotional scars to this very day.
They probably would have been bullied no matter what their last name was, but it sure didn’t help matters!
My name is Weiss, which means “white” in German. Thankfully, most people who would give me a problem about it don’t know, and for those that do I explain that I’m of Russian and Polish extraction and Jewish as far back as I can trace.