Hubert "Hugh" Neutron is Jimmy's silly father and son of Granny Neutron. He is completely oblivious to the fact that his son is a prodigy and is rather childish at times. He also loves Judy, his wife, and her pies. He calls Judy, Sugarbooger, and Jimmy, Jimbo. He is otherwise a typical father and always has a piece of advice for Jimmy. Hugh has dumb relatives, so many assume Jimmy's genius is not inherited paternally. In "Cousin Clash" it's revealed that most of Hugh's relatives look like him. In the same episode, it is revealed that the Neutron family is a carrier for a gene that causes extreme intelligence. However only baby Eddie and Jimmy have been seen to have incredible intelligence because of this gene, while several of the Hugh lookalikes are equal to his own intelligence if not dumber.