I like Emerson John the best and goes nicely with your oldest sons name! Second choice would be Maxton and like the others, I don't really care for Maximus! Good luck on your decision!
Hey Emily! My vote is for Maximus. I love that name! I always wanted to name my 1st son "Max" for many years. And then my sister went ahead and trumped me! She named her son Maxwell. Oh well... but you take it! :-)