In his contribution, the author discusses the Yakut forms in the travelogue of the physician, botanist and geologist Johann Redowsky (1.1.1774–8.2.1807). The travelogue was recorded on the occasion of Count Yurii Aleksandrovich Golovkin’s diplomatic mission to China. Redowsky accompanied Golovkin representing the Academy of Sciences. The travel diary documents Redovsky’s journey from Irkutsk to Kamchatka in 1806–1807 and contains much ethnographic information about Tungus and Yakuts. Redowsky’s material is interesting because it contains lexemes that are not found elsewhere, or at least not in the form noted in the diary.