A Sindarin title for Manwe (PM/358), a combination of aran “king” and einior “elder”.
Sindarin
Aran Einior
noun. Elder King (Manwë)
aran einior
proper name. Elder King, Manwë
manwe
manwë
in Sindarin as well (na Vanwe), or he may be referred to as Aran Einior ”the Elder King”.
aran (king) + einior (“elder”) > an (comparative prefix) + iaur (“ancient, old”)