Yilbegän is a multi-headed man-eating monster in the mythology of Turkic peoples

Turkic peoples

The Turkic peoples are peoples residing in northern, central and western Asia, southern Siberia and northwestern China and parts of eastern Europe. They speak languages belonging to the Turkic language family. They share, to varying degrees, certain cultural traits and historical backgrounds...

 of Siberia

Siberia

Siberia is an extensive region constituting almost all of Northern Asia. Comprising the central and eastern portion of the Russian Federation, it was part of the Soviet Union from its beginning, as its predecessor states, the Tsardom of Russia and the Russian Empire, conquered it during the 16th...

, as well as Siberian Tatars

Siberian Tatars

Siberian Tatars refers to the indigenous Siberian population of the forests and steppes of South Siberia stretching from somewhat east of the Ural Mountains to the Yenisey river...

. In some myths Yilbegän is a winged dragon or serpent-like creature, while in others he is an ogre

Ogre

An ogre is a large, cruel, monstrous, and hideous humanoid monster, featured in mythology, folklore, and fiction. Ogres are often depicted in fairy tales and folklore as feeding on human beings, and have appeared in many classic works of literature...

-like behemoth who rides a 99-horned ox. Some epics feature multiple Yilbegän with different numbers of heads who are the offspring of Altan Sibaldai, "the golden witch", a cohort of the lord of the underworld. Some epics also mention a Yilbegän king named Yelmogus.