Charaz - I am soooo sorry you had to go through all of this. As all the others have said, it's your right to name your baby what you want to name him. I don't understand how your IL's think that they can dictate to you what to name your child?? That's just bizarre and completely controlling.
I really hope that, someday soon, you are all able to move on from this. It sounds like, despite everything, you are enjoying motherhood which is great to hear. Hugs for you, matey!