Så här berättar Morell hur han kom på namnet Rambo:
"In the early stages of composition, I struggled to find a strong name for the character. One afternoon while I was writing, my wife came home from a grocery store and said that she'd found a new kind of apple that she thought was delicious. Apples were the farthest thing from my mind while I struggled to find that character's name, but politely I took a bite of the apple and discovered that it was in fact delicious. "What's it called?"