We cant decide

Hi, I'm 8 weeks pregnant and me and my boyfriend cant agree. I know its really early days yet but how will I get him 2 agree? I tried compromising but he still won't budge...It's frustrating.
He likes Dylan for a boy or Amy for a girl
I like Evangeline or Willow for a girl or Keiran and Aiden for a boy...
Also when do you guys think it would be an ideal time to tell our families? We know we should wait but how long?

Thanks =]