I haven't heard of many Jacob's or Zac's at the moment, i only know of 2 Zac's and they are both around 11mths old and so is the Jacob i know.

I love the name Isabelle we are thinking Isabelle for a girl aswell but now DP isn't so sure... it's doing my head in, our 10mth old is Ava Lilly and that was the one and only girls name we picked.... this time round is soooo hard!

We had Tyler William for a boy but seems it's not meant to be.

I hope DH's brothers GF doesn't keep hers secret and pop out the bubba before you, scary if you pick the same names... maybe see if she will give up some of hers to make sure your not on the same track?