-o

1 genitive ending, as in Altariello, Oromëo, Elenna-nórëo, Rithil-Anamo, Rúmilo, Lestanórëo, neldëo, omentielvo, sindiëo, Valinórëo, veryanwesto, q.v. In words ending in -a, the genitive ending replaces this final vowel, hence atto, Ráno, Vardo, vorondo as the genitive forms of atta, Rána, Varda, voronda q.v. Following a noun in -ië, the ending can have the longer form -no, e.g. *máriéno “of goodness” PE17:59, but contrast sindiëo “of greyness” in PE17:72.Where the word ends in -o already, the genitive is not distinct in form, e.g. ciryamo q.v. = “mariner” or “mariner’s”. Pl. -ion and -ron, q.v.; dual -to but possibly -uo in the case of nouns that have nominative dual forms in -u rather than -t. The Quenya genitive describes source, origin or former ownership rather than current ownership which is rather covered by the possessive-adjectival case in -va. The ending -o may also take on an ablativic sense, “from”, as in Oiolossëo “from Mount Oiolossë” Nam, sio “hence” VT49:18. – In some of Tolkien’s earlier material, the genitive ending was -n rather than -o, cf. such a revision as Yénië Valinóren “Annals of Valinor” becoming Yénië Valinórëo MR:200. 2, also -ó, "a person, somebody", pronominal suffix PM:340