Ellei Bootur

Ellei Bootur is regarded as a cultural progenitor of the Yakut, with origins variously described as unspecified, around Lake Baikal, or among the Urankhay, Mongols, or Tatars. After arriving at the Middle Lena, he became a slave of Omogoy and later married one of Omogoy's daughters, following which he was expelled but given a horse and cow. Ellei is credited with skills in blacksmithing and carpentry, building a homestead with a window, door, stove, and chimney, constructing animal pens, and instituting the spring kumis festival Yhyakh, which remains celebrated by the Yakut.