topon. Land of Willows, (lit.) Willow-vale
Land where the river Narog met the river Sirion, translated “Land of Willows” (S/120). It is a combination of nan(d) “valley” and the adjective tathren “of willow” (SA/nan(d), tathar).
Conceptual Development: This name appears as G. Nantathrin with an i in the Gnomish Lexicon from the 1910s, and as G. Nan Tathrin in Lays of Beleriand from the 1920s (LB/61). It also appeared as N. Nan-Tathrin in Silmarillion drafts from the 1930s, at one place translated “Valley of Willows” (SM/35) but generally translated “Land of Willows” (SM/141, LR/126). Later in the 1930s Tolkien revised the name to N. Nan-tathren with an e (LR/145), a form that also appeared in the Etymologies with the same derivation as given above (Ety/NAD, TATHAR).