Hi J. - congrats on your upcoming new arrival!
Here are some babynaming resources that I found invaluable when looking for names for my 2 kids (the youngest is 6 months now).
http://thebabynamewizard.ivillage.com/parenting/
This one is a blog on baby naming - lots of suggestions and food for thought.
http://www.babynamewizard.com/namevoyager/
What you want to do is load/open the Name Voyager. It is an interactive database that will show you on a graph how popular a given name was in any particular year (goes up to 2006, 2007 data has not yet been released) starting from the 1880s. This one was really important to me, since having grown up with classes full of Lisas and Michelles, but not meeting another C. until I was in 11th grade, I wanted my kids to have not-common names. (Jacob, for example has been the #1 name for boys since 2000 and was #5 in the 90's - there are going to be dozens at any particular school, and probably multiples in many classes.)
http://www.nymbler.com/
This is a newer one that didn't debut until after I had already decided on names for my most recent DD. Nymbler actually suggests names, once you give it some you like or dislike. = )
A book I liked to look through (the FFX Co library has it, check on yours) was "Beyond Jennifer & Jason". Instead of focusing on 'name meanings', it focused on current perceptions of names (like, would you think a Bambi is smart or a Warren is a jock or an Ethel is a model?) Neat food for thought. = )
I agree that it's hard to suggest names without knowing your last name, I feel that the whole name needs to flow. Also, from what you're saying, I doubt you'll find a 'J' name that is hispanic that you will like, since you don't like the jota sound. Only one that comes to mind is Jorge (sounds like George - 'Geor-hay' - no jota sound, but no 'j' sound either.
Good luck!