Qasar (also spelled
Hasar or
Khasar, and also known as
Jo'chi Qasar;
Mongolian: Хасар) was one of
Genghis Khan's three full brothers. According to the
Jami' al-Tawarikh, his given name was Jo'chi and he got the nickname Khasar after his distinguished bravery. He was also called
Habutu Hasar (
Хавт Хасар,
Hasar the Skillful (archer)) because he was skilled with a bow.