Jonathan is Nancy's and JoJo's cousin and a recurring character in Fancy Nancy.
Similar to his cousin he also enjoys fancy stuff. He's a magician and loves playing dress up.
- It is unknown how he and Nancy are cousins, with either their mothers being sisters, their fathers being brothers, Pete and Claire being siblings or Judy and Doug being siblings
- Prior to the series, he went by "Jonny", but now he goes by "Jonathan".
- He makes his second appearance in the episode "Nancy Clancy, Pet Psychic!" where he sings for the first time ("It's a Gift.")
- His surname is unknown. He has never been referred to as "Jonathan Clancy" so he could possibly have a different last name.