Born Uriah Rapoport in Minsk, my grandfather changed his last name to Harris when he immigrated to the United States in the late 1870s at the age of 9. I was told he stayed with the Harris family only for one night, but kept their name for the rest of his life.
I have nothing against the name Harris, but “Rapoport” connects me to a past before my grandfather. I looked up the name. There were many distinguished Ashkenazi rabbis named “Rapoport” in Eastern Europe, even in Minsk. My great-grandfather was not one of them: he was in the lumber business.