I need help naming this baby!?!?!?!?!?

I am 20 weeks pregnant with my 4th right now. My oldest is named Tatiana Elizabeth (Elizabeth after my mother who died while I was pregnant with her. My son is named Diego Alexander Jr (after his father) and my youngest as of right now is named Evelyn Helena. Our last name is Gonzalez. I don't know the of this baby. All I know is if its a boy, I want the middle name to be Manuel (after my father who died while I was pregnant with Evelyn. I need a good first name for a boy that flows nicely with the other kids names and I need a girls first and middle name! I am having a brain fart HELP!