I think I've mentioned about the devout Catholic Patrick Ohara -- who was full-blooded Japanese, from Nagasaki.
It's important to remember that Latin America is nearly as much a melting pot as Anglo-America. The founder of Chile was Bernardo O'Higgins. Heinlein told in his travel book Tramp Royale, and later made it a minor incident in one of his novels, encountering a young lady in Peru who stated her surname as "HONE-ace" -- spelled J-O-N-E-S. There was a large Welsh colony in Argentina (which a few years ago was the nation with the second-largest Welsh-speaking population, after the U.K. and with numbers in the five digits), many German emigrants settled in Brazil and Paraguay, and I'm personally e-acquainted with a chemical engineer working in Brazil whose family is of Italian extraction.* Several countries you would not at first think of have Tamil minorities of significant size; I recall Trinidad and Tobago as one. Don't forget that the Philippines were a stable Spanish colony for 300 years; I'd make a top-of-head guess that Spanish-derived names are used by about 10% of the population.
* Amusingly, a mutual friend I met through him is called "Kike" -- not the English-language vulgar insult for Jew, but KEE-kay, a nickname for his baptismal name Enrique.