A region in eastern Beleriand translated Ossiriand glossed “Land of Seven Rivers” (S/94), a reduction of primitive otoso “seven” combined with sîr “river” and the suffix -ian(d) “-land” (RC/384).
Conceptual Development: In the earliest Silmarillion drafts from the 1930s, this name first appeared as Assariad (SM/133) and on early maps as Ossiriath “of the Seven Rivers” (SM/233), but was soon revised to N. Ossiriand “Land of Seven Streams” (SM/116), the form it retained thereafter. Later in the 1930s its gloss was changed to “Land of Seven Rivers” (LR/128).
The genitive form Malariando “of Beleriand” was given as the Quenya translation of S. Beleriand appearing in linguistic notes from the 1950s (PE21/78). This form implies that primitively the initial form of this name began with mb-, but that concept is not well supported by other evidence. The lenited form of S. Beleriand consistently had an initial V- (VT50/18, LR/202), making Valariandë is a more probable Quenya form of this name.
Conceptual Development: The (ᴹQ) genitive form Valarianden appeared in an alternate title for the Silmarillion drafts from the 1930s (LR/202). In linguistic notes from the 1940s, this name appeared as Veleriande (PE22/126), but the use of e in this form means it is most likely a direct adapation of the Noldorin name.