Erumande, inflected noun: (as?) in heaven. As indicated in the Syntactical analysis above, it is not altogether certain what the nominative of this word may be. Since the nominative of cemende(as?) on earth is known to be cemen, one plausible assumption could be that the word before us is #Eruman inflected for the same (obscure) case. (This obviously cannot be equated with the Eruman of LR:356 s.v. ere-, which is a "desert N.E. of Valinor".) Yet this strange "locative" (?) ending could also be #-nde, simplified to #-de when added to a word ending in -n (like cemen); if so the nominative would be #Eruma. Both of these words can be assigned more or less plausible etymologies. #Eruman could incorporate "the Valarin element aman, man blessed, holy [that the Elves] learned from Oromë"; thus #Eruman would identify "heaven" as the blessed and holy abode of the One (PM:357). It is also possible that #man means place, so that #Eruman is The Place of God: A word men place, spot occurs in Etym. (LR:372 s.v. men-), but one word seems to hint that Tolkien later changed it to #man or #mane (perhaps he was troubled by the homophony with the dative pronoun #men for us): In SD:56, in an earlier version of the words spoken by Aragorn at his coronation, the word here or in this place appears as símane (evidently sí-mane this-place – cf. símen in Fíriel’s Song, see the entry síra). On the other hand, if we assume that the nominative is the shorter form #Eruma, this could incorporate the not uncommon ending -ma, primitive -mâ. While this ending is primarily "a suffix frequent in the names of implements" (WJ:416), which is clearly not appropriate here, it can also take on more general meanings. For instance, the noun #corma "ring" (attested in LotR as part of the compounds Cormarë Ring-day and cormacolindor Ring-bearers, the latter translated in Letters:308) is clearly to be referred to the stem kor- "round" (LR:365). Thus, a #corma is simply a *"round thing". Likewise, #Eruma could – presumably – be simply "a thing (actually a place) associated with God", which "heaven" is. As for the precise meaning or significance of #Eruma(n) (irrespective of its etymology), it would seem to denote the dwelling or presence of the One, evidently the "place" beyond and before Eä where the drama of the Music of the Ainur transpired. This would be "the fair regions that [Eru] had made for the Ainur", where afterwards "of the Ainur some abode still with Ilúvatar beyond the confines of the World" when others left and entered Eä (see the Ainulindalë). Since Melkor also left, we must assume that this was indeed a place where the will of Eru reigned supreme and unchallenged ("thy will be done, on earth as it is in heaven"). Hence #Eruma(n) can be used to translate English heaven meaning the dwelling of the Deity, though unlike the English word it does not also refer to the sky above the earth; #Eruma(n) would be beyond our universe altogether. The Númenóreans, taught by the Elves, "did not conceive of the sky as a divine residence" (Letters:204) – which may explain why Tolkien did not use the standard Quenya translation of heaven, menel, in this prayer. Menel is just "the region of the stars" (RGEO:72), "the firmament" (SD:401), "the apparent dome in the sky" (MR:387), the "heavens" above the physical earth (see the Silmarillion Index, entry kemen, quoted under cemen above). Menel does not refer to the dwelling of God.
esselya, noun with pronominal ending: thy name. The possessive ending -lyathy, your corresponds to the verbal ending -lyë thou (see elye). In the text before us, -lya also occurs in the words aranielya thy kingdom, indómelya thy will and mónalyo of thy womb, in the latter case with the genitive ending -o added (regularly displacing the final -a of -lya). The ending -lya was previously attested only in the word tielyanna upon your path (UT:22 cf. 51; this is tie-lya-nna path-your-upon), and it corresponds to the ending -lyë for you, thou (see -mma for further discussion of the relationship between the pronominal suffixes for subject and possession). The noun that -lya is here suffixed to, esse name, is a well-known Quenya word, occurring in LotR, Appendix E as the (later) name of Tengwa No. 31. Esse also occurs in various forms and compounds in MR:214-217, reproducing a post-LotR source. It is also found in the Etymologies, where it is derived from a stem es- indicate, name (LR:356). The ancestral form is nowhere given but is probably *essê, the ending -ê often being used to derive nouns denoting intangibles or abstracts: examples include such primitive forms as rênê remembrance (PM:372, base given as ren-), slîwê sickness (LR:386 s.v. sliw-), or tûrê mastery, victory (LR:395 s.v. tur-). *Essê from es- is however not wholly parallel to these formations; instead of lengthening the stem-vowel (which would have produced primitive **êsê > Quenya **éze/ére), the consonant s of the stem is lengthened. This may be compared to the derivation of the primitive noun lassê leaf from the base las- (in the Etymologies las1-, LR:367; cf. also Letters:282). In the essay Quendi and Eldar, Tolkien explained that the "true relation" of the derivative lassê to its stem las- can be expressed as laS-ê (VT39:9), the capital S denoting a strengthened or lengthened consonant. Similarly, the relation of *essê to its stem es- may be described as *eS-ê. (Compare #massa bread from the stem mbas-; see massamma.)