Quenya 

yan

for/to which

yan relative pronoun in dative "for/to which" or "for/to whom" (PE16:90, 92, 96). Used for "to whom" in the poem Nieninque; according to the system described elsewhere, which distinguishes personal ye "who" from impersonal ya "which", "to whom" would be *yen instead. A wholly distinct ya(n) seems to appear as an ephemeral word for "as" in one version of the Quenya Lord's Prayer; see ya #2 (VT43:16, VT49:18)