This article investigates historical-cultural interpretations of real but over time forgotten events related to heroic epos-olonkho and ancient feasts-isseakh of Sakha people. Destination of Aii God, composition structure of olonkho, sacred content of round dance osuokhai and blessings algys are revealed. We compare collective perfections archetypes of olonkho and isseakh concerned with ancient cult Aii. Primary concern of narratorsolonkhosuts and their style of performing olonkho are elicited. Olonkho, osuokhai and algys are indispensable constituency of present-day Yakut feasts.
Keywords: Olonkho, osuokhai, algys, Heavenly Aii Gods.