There was a lot of name-changing at Ellis Island. I knew a guy whose grandfather's native name had three "Ks" in it (not one right after the other) and was virtually unpronouncable to Americans.
According to the story, the immigration officer just said, "Okay, your name will be Kayes."
Worked just fine.
(Incidentally, he was a veteran of Anzio Beach during WWII and still had his old uniform hanging in the closet. I saw it once when I was hanging up my coat, and I had to pry out of him what it was all about. But that's all he would say about it except that he was in the infantry.)
Terry, 230RN