Actually, I like Mollie (spelled that way) better than Natalie. Mollie and Caleb flow and sound Irish. To me, Natalie reminds me of an Italian girl. I like Caleb, Mollie, Sean, and Brigit or Kelly. Stick with the Irish Theme since you already started it. I love it!
And I just scrolled down, and saw that you like Caroline. That is my daughter's name, and I love it! I actually like Caleb and Caroline. It flows nicely. Everyone loves her name and we have so many cute nick names for her. Just something to think about!