a sort of unnusual question

[velkoria.livejournal.com]

Because of personal reasons I have been considering changing my name. The thing is I don't want to change my first or middle names... I want to change my last name and I don't know if you can help me some here or not. My full name is Monica Eloisa and my last names just... don't go with me. Considering I am hispanic but speak english and plan to move somewhere that english is the main language I want a name that sounds good in both languages. I am pretty sure I want to use my mom's last name as a first last name. That being Ruiz. I have given some thought to the second one (as hispanics often do I have 2 last names) and I think I am pretty sure I want either Cervantes or Cohelo. Now... as most of you are english speakers... which one do you like better?