What's in a name? Well, you're about to find out!
So, you may ask, where did their son's unique middle name come from? It seems as though it's a combination of names from both side of the newborn's family.
Anne's paternal grandfather was named Roseline, while Adam's mother's maiden name was Banks.
To add to the mix, Adam's middle name is also Banks. So they're keeping it in the family!
Hathaway gave birth to her little one on March 24, and currently is "surrounded by friends and family in L.A.," a source tells E! News.