It varies. The American practice is generally to try and get it horribly wrong. The English practice is to try to get it horribly wrong. In Byron's poem Don Jua

It varies. The American practice is generally to try and get it horribly wrong. The English practice is to try to get it horribly wrong. In Byron's poem Don Juan, the title character's name is pronounced Don Jew-on. This is, of course, just one example of many. Assuming you're speaking of Spanish speakers from Spain (and not Latin America), they may be reacting to the customary mangling of Spanish by their UK counterparts. Most of the Latin Americans I've met have no problem with English names. They may say them with some odd vowels on occasion, but they're no unintelligible. It could be heavy exposure to American media.