How do you convert English names to Spanish?

Answer 1

It varies. For example:

Juan = John

Pedro = Peter

Paulo = Paul

Maria = Mary

Catalina = Catherine

English and Spanish names typically come from the same linguistic origin, Latin. If you go back to the Latin names, there are certain changes as the name moves into English and as the name moves into Spanish, but these transitions are unpredictably applicable making an exact formula impossible.

Answer 2

A great internet resource is behindthename.com. This will give you a comprehensive list of every form of almost any name, current and past, male and female; you can also specify a language and gender you want a translation for. Need a quick translation at a time when you don't have internet access? Biblical names are very commonly used in Spanish cultures, and these can be easily translated by comparing their usages in the English and Spanish bible translations.