Name inspiration?! Help?!?!

So I have a girl name picked, my dilemma is that I have used all my boy names! I have 3 boys, and 1 girl, I have an Aiden James, Bella Jean, Evan Eddie, and Waylon Ray. If this baby is a girl it's going to be Emma Joy (my husband picked, and I like it so for now it stays mostly cause he doesn't usually help me with names and it was amazing to see him get excited!) But if its a boy, I am lost, I feel like I would love to involve my husband first name Dustin maybe as a middle name because it's his grandpas last name, and it means a lot to him, his grandpa was an engineer in the army and responsible for an airplane that he named and painted "The Dauntless Dusty" and Dusty is my hubby's nickname, his grandpa's first name was Arthur, help me out!!!!!