Although dominancy is not a characteristic feature of Turkic, traces of this phenomenon can already be observed from the Old Turkic period. It is also represented in modern Yakut in a great number of cases, see e.g. -Ān, -ĀhXn, -X̄r, -X̄, etc. In present paper these derivational elements will be discussed from a historical point of view in order to present how dominancy could be developed and gained ground in modern Yakut. On the base of the analysed Yakut material, a possible explanation for the dominancy of the Old Turkic derivational elements -Xš and -Xn also will be outlined.