Proto-Tungus-Manchu: *uK-
Meaning: 1 unity, accord 2 kin; successors
Russian meaning: 1 единство, согласие 2 род; потомство
Literary Manchu: uxe 1, uqsun 2
Comments: ТМС 2, 254, 257. The root is attested only in Manchu; uqsun may be < Mong. (although suffixation is different), but uxe is no doubt genuine.