S. Sirannon pn. “Gate-stream”
Conceptual Development: In Lord of the Rings drafts from the 1940s, this name was already as N. Sirannon (RS/445).
References ✧ LotR/300; LotRI/Gate-stream, Sirannon; RC/276; SA/annon, sîr
|sîr||“river, stream”||✧ SA/sîr|
|annon||“(great) gate, door”||✧ SA/annon|