ana (1) prep. "to" (VT49:35), "as preposition _ana _is used when purely _dative formula is required" (PE17:147), perhaps meaning that the preposition ana can be used instead of the dative ending -n (#1, q.v.) Also as prefix: ana- "to, towards" (NĀ1); an (q.v.) is used with this meaning in one source (PE17:127)_
-n (1) dative ending, originating as a reduced form of -nă "to", related to the allative ending -nna (VT49:14). Attested in nin, men, ten, enyalien, Erun, airefëan, tárin, yondon (q.v.) and also added to the English name Elaine (Elainen) in a book dedication to Elaine Griffiths (VT49:40). The longer dative ending -na is also attested in connection with some pronouns, such as sena, téna, véna (q.v.), also in the noun mariéna from márië "goodness" (PE17:59). Pl. -in (as in hínin, see hína), partitive pl. -lin, dual -nt (Plotz). The preposition ana (#1) is said to be used "when purely dative formula is required" (PE17:147), perhaps meaning that it can replace the dative ending, e.g. *ana Eru instead of Erun for "to God". In some of Tolkiens earlier material, the ending -n (or -en) expressed genitive rather than dative, but he later decided that the genitive ending was to be -o (cf. such a revision as Yénië Valinóren becoming Yénië Valinórëo, MR:200).
-nnato, at, upon
-nna "to, at, upon", allative ending, originating from -na "to" with fortified n, VT49:14. Attested in cilyanna, coraryanna, Endorenna, Elendilenna, númenórenna, parma-restalyanna, rénna, senna, tielyanna, q.v. If a noun ends in -n already, the ending -nna merges with it, as in Amanna, formenna, Elenna, númenna, rómenna as the allative forms of Aman, formen, elen, númen, rómen (q.v.). Plural -nnar in mannar, valannar, q.v.
ana-¹prefix. to, towards
an(a)preposition. to, towards, to a point near, alongside, *[ᴱQ.] until
napreposition. to, towards
@@@ fix weird cognate bug
na (2) prep. "to, towards", possibly obsoleted by #1 above; for clarity writers may use the synonym ana instead (NĀ1). Originally, Tolkien glossed na as "at, by, near"; the new meaning entered together with the synonyms an, ana (VT45:36).
* ana-prefix. to, towards