Sindarin name of the “Annals of Valinor”, a combination of ínias “annals” and Dor-Rodyn “✱Land of the Valar” (MR/200).
Conceptual Development: In Silmarillion drafts from the 1930s, this name first appeared as N. Inias Valannor in keeping with the different rules of lenition from that period, later revised to Inias Balannor (LR/202).
în (“year”) + as (#abstract collective suffix) #This suffix probably denotes “a complete set of different items of one kind”.