No, I don't think so. I once visited Germany with a friend who had a lot of friends there. One of her friends was
Paul, pronounced in
German like POWELL. After returning, I referred to
Paul to my friend's husband, saying
Paul with the English pronunciation. He corrected me, saying, "You mean POWELL?" I said, "I thought it was acceptable to pronounce the name the way it is in one's native language." He then said, "It is." So I don't know why he even said that.
I would have felt like an idiot saying POWELL.