Abstract: The traditional Yakut culture preserved the rituals rooted in the Ancient Turkic era of Southern Siberia. Particular interest arouses the burial rite of Yakut people, among which was cremation of the deceased. In legends, this ritual is associated to the ancient tribe Kyrgys that lived well ahead of the arrival of the ancestors of Yakut people to the middle Lena River – Omogoya and Ellyaya. Noteworthy is that accordant to the Chinese manuscripts, this ritual is also known among ancient Turkic and Yenisei Kyrgyz people. Records on the existence of isolated instances of cremation of the deceased among Yakut people of the northern suburbs occur all the way until ethnographic modernity. The article applies the authentic historical sources, as well as the interdisciplinary research data in the field of forensic medicine, ethnography and folklore, which allow examining the materials on both, historiographical and interpretational levels. The goal of this work lies in the description and analysis of cremation rite and burial objects At Batyran III and Kuuduk III in the XIV – XVIII centuries, discovered and explored in one of the three valleys of middle Lena River – Erkeeni. The author assumes that at the end of first millennium AD, some part of Yenisei Kyrgyz people arrived to the territories of Lena River, and having gradually adjusted to the local environment, became a part of the forming Yakut nation.