What was the name of Genghis Khan's imperial guard?

Genghis Khan’s imperial guard was called the Kheshig. It was an elite household institution whose members protected the khan and his family and held unusually high status in the Mongol political order.

The Kheshig included a daytime guard, commonly called the Torguud, and a nighttime guard, known as the Khevtuul. Its duties went beyond personal protection: members served close to the ruler, carried messages, attended court, and could become trusted military or administrative officials. Because they lived near the khan, they were positioned at the center of decision-making.

Traditions about the guard developed from earlier steppe practices. After defeating the Kereyids in 1203, Genghis Khan organized his own Kheshig from loyal personal followers. Early accounts describe a force of roughly seventy day guards and eighty night guards; it later expanded dramatically, reportedly reaching the size of a tumen, or about 10,000 men.

Tumen was a military unit, Yassa was a body of law or customary regulation, and Yam was the imperial relay network. None was the name of the guard.