Behter or Bekter (Mongolian: Бэхтэр; died 1176) was the son of Yesugei, chief of the Khamag Mongol, and a junior wife named Sochigel or Suchigu in some sources and Ko'agjin in others. He was also a half-brother of Genghis Khan, then known as Temujin. On the death of Yesugei, Temujin, his mother Hoelun, his siblings and two half-brothers (including Behter, Belgutei and their mother Sochigel) were abandoned by their tribe and left to fend for themselves.[1][2] Living off the land, they managed to survive. However, the older half-brothers deprived 14-year-old Temujin and his brother Qasar of their spoils. Temujin and Qasar stalked and killed Behter, for which they were scolded by their mother Hoelun.[3]