Some great suggestions thank you

marcusdeanasmum I love those names

and have in fact discussed most of them with DH, he is not a fan of most of them, especially Quinn and Bryce which I quite like!
Fifi-trixibelle: That list is excellent, the reason we aren't going with Isaac

is that it is the reverse s and c sounds of my DS's name and it all sounds like a mouthful when yelled out in the food court!!!
Maisy: Love those names as well, but not keen on the NN's.
Memy: I absolutely love Asher, my DD's name starts with A, and my DS and I already share the same letter first name, I think it would all be a bit weird
Thanks again ladies, I think Caleb is the frontrunner, if anyone has anymore suggestions I would welcome them!!
Lisa