Jonathan "Jonny" Quest is an 11-year-old American boy who lost his mother at an early age. Though unenthusiastic in his schooling, he is adventurous and generally athletic, with a proficiency in judo, scuba diving, and the handling of firearms. He takes on responsibility willingly, attending to his studies, and treating adults with respect. His voice was provided by actor Tim Matheson.
While Jonny's actual birthday is unknown, it can be estimated to be somewhere between 1953 and 1954 (this is because he is 10-11 in the 1964 series). At an early age he lost his mother. To protect him the government assigned him ex-agent Race Bannon to be his bodyguard. As far as we know, Jonny has spent his entire life traveling the world with his father.