-on gen.pl. ending (3O), in aldaron, aranion, elenion, Eldaron, #esseron, Ingweron, Istarion, Númevalion, Quendion, Silmarillion, Sindaron, tasarion (see Nan-Tasarion), Valion, wenderon, yénion. Normally the ending -on is added to the nominative plural, whether it ends in -i or -r, but some nouns in -ë that would have nominative plurals in -i seem to prefer the ending -ron in the genitive (hence #esseron as the gen. pl. of essë "name", though the nominative pl. is attested as essi and we might have expected the gen. pl. *ession; similarly wenderon, Ingweron).
-n (3) a plural sign used in some of the case endings (WJ:407): Pl. genitive -on, pl. ablative -llon (but also -llor), pl. locative -ssen.
-ionson (of), descendant
-ion (patronymic ending) "son (of), descendant" (YŌ/YON, LT1:271, LT2:344). Not to be confused with the genitive ending -on when added to words with nominative plurals in -i, e.g. elenion "of stars" vs. eleni "stars".
-ionsuffix. -son, masculine patronymic
-mosuffix. agental suffix
-r(o)suffix. agental suffix
morionson of the dark
morion noun "son of the dark" (LT1:261). In Fíriel's Song, Morion is translated "dark one", referring to Melko(r); this may be a distinct formation not including the patronymic ending -ion "son", but rather the masculine ending -on added to the adjective morë, mori- "dark".
-asuffix. adjectival suffix
This suffix is frequently used to create the adjective form of a noun, especially in the form -ëa for nouns ending in -ë. This function dates back to CE. ✶-ā.
essë (1) noun "name", also later name of Tengwa #31, originally (MET) called árë (ázë). (Appendix E). With a pronominal ending esselya "thy name" (VT43:14). Pl. #essi in PM:339 and MR:470, gen.pl. #esseron "of names" in the compound Nómesseron (q.v.); we would rather have expected *ession, given the nom.pl. essi; perhaps #esser is a valid alternative plural form. Essecarmë noun "name-making" (MR:214, 470), Eldarin ceremony where the father announces the name of his child. Essecenta *("k") noun "Name-essay" (see centa) (MR:415); Essecilmë noun "name-choosing", an Eldarin ceremony where a child named him- or herself according to personal lámatyávë (q.v.) (MR:214, 471). The meaning Tolkien originally assigned to the word essë** in the Etymologies was "place" rather than "name" (VT45:12).
[sanda, sandë] (þ) (2) noun "name" (VT46:16)
[sanya] (þ) (2) noun ?"name" (reading of gloss uncertain, VT46:16)
velicë ("k") adj. "great" _(LT1:254; probably not valid in Tolkien's later Quenya; in the context of the Etymologies it would have to be derived from _BEL, but it is stated that this stem was "not found in Q". Perhaps Tolkien rejected velicë because it was too similar to the Russian word that clearly inspired it.)