It's not unusual to find people who have multiple ethnic backgrounds. This can sometimes mean interesting mixing of cultures. My daughter has a friend whose mother is from Brazil and whose father is from Taiwan. Our neighbor is from Bolivia; her husband is a north Jersey Italian.
My children have an ethnic background that spans most of northern Europe from England to Poland with many countries in between. But one nationality they can't count in their background is Italian.
Maybe that explains why when we have ravioli for dinner my son says "Yay - Pierogies!"