A term for Elves who did not reach Aman (S/53, WJ/373), a combination of the negative prefix ú- and Amanyar, “Those of Aman”. This term applied to Elves who intended to go to Aman but were unable to complete the journey, as opposed to the Avamanyar who refused to go to Aman in the first place, more commonly known as the Avari (WJ/371). In a few places this term appeared instead as Úamanyar (WJ/373, PE21/72).
Conceptual Development: In Silmarillion revisions from the 1950s-60s, Tolkien first used the term Alamanyar for those not of Aman, using the negative prefix al(a)- (MR/170). The change to Úmanyar reflects Tolkien’s general vacillation on the basis for Eldarin negation: the roots √LA or √Ū. In some linguistic notes from the early 1950s, Tolkien also changed Alamanyar to Úamanyar, but in later emendations from 1970 he wrote “stet” next to Alamanyar indicating he was considering restoring it (PE21/72, note #13). In other notes from the late 1960s, Tolkien also consider restoring the Alamanyar form (PE22/156).
Úmanyar pl. noun "those not of Aman", Eldar that did not reach Aman, sc. Sindar and Nandor _(SA:mān). _Sg. #Úmanya.Also Úamanyar.