Are you talking about names you will find on a Spanish-language baby-names list that are the exactly the same in English? (For example, Arlo, Damian, Jonas, Julian, Xavier, Roman.)
Or just Spanish names that aren't incomprehensible to people who speak English? Since there are so many Spanish place names in the U.S. derived from saints, this category won't be too hard. (For example, Luis, Diego, Pablo, and Raphael.