The Secret History of the Mongols
In "The Secret History of the Mongols", Jelme is chronicled as having been given to Temujin when the latter was an infant, but was deemed too young, and sent back with his father. Jelme's father Jarchiudai again gives his son to Temujin when Temujin was meeting with the Wang Khan. The reason for Jelme's having been given to Genghis is unclear.