For a study of the mythological and religious role of historical persons of the Mongolian ethnic groups a large amount of different sources can be utilised. In addition to the data in contemporary and earlier historical sources, primarily in the chronicles, a considerable quantity of folklore material of different genres contains information on this topic. Historical persons appear in different mythological and ritual roles in the folk religion and the folk belief system. In the toponymic myths and legends (Khal. domog) usually the most venerated historical heroes of a region are connected to a certain place name, and in the aetiological myths they act as the creators of certain customs. The present article surveys only the mythological and religious role of the Mongolian great khans. It offers a typology of the main motives connected to the above-mentioned aspects of the worship of a historical person.