Missouri Mosely was a frontier psychic woman.Kripke tweeted that the meaning behind the name Missouri Mosely came from his wife’s great-great grandmother. She was reportedly a frontier woman and a psychic named Missouri Mosely.
Bobby Singer’s character was created out of the blue...Kripke tweeted that he wanted to revive the character Missouri Mosely, but since she was unavailable, he created Bobby Singer.
Castiel was named thanks to a Google search.When creator of the show Eric Kripke needed a name for a new character for a Thursday episode, he turned to Google. He searched “Angel of Thursday,” and the name Castiel appeared.