Comments:MGCD 674. Mong. > Evk. unukān etc., see Doerfer MT 104, Rozycki 218. Associating *una-ga(n) with una- 'to fall, drop' is most certainly a folk etymology. -gan is a widely spread suffix in animal names (daɣa-ga(n) 'colt', qura-ga(n) 'lamb' etc.); the usage of una-gan as 'having certain characteristics from birth' is also easily explainable: cf. phrases like unaɣan ǯiruɣa 'a horse able to travel at an amble since birth', lit. 'foal-ambler' = 'fast ambler since foalhood'.