MAP

Dorwinion

Sindarin: Dorwinion ‘Great land of youth’ (as also known in English, German)

The meaning of “Dorwinion" is conjectural, based on lines from "The Hobbit" that suggest that this is the land where the elf-king, Thranduil’s, folk got their strong wine, which is suspicious since there is little reason to believe that there is a similarity between Sindarin "win" and the similarly sounding English "wine". Parma Eldalamberon 17:191 suggests a new interpretation based on "gwîn", meaning "young”.

dôr S – land E
gwîn S – young E
-on S – great E, as in ardhon
-ion S – (great) realm, as in rhovanion, eregion
dôr + gwîn → dorwin, lenition, vowel shortening

References: Verified: LR/Map, PE:17:191 Case-sensitive: H(2), III(3), V(3), Hde1(2)

Dorwinion — Tolkien Gateway

Dorwinion — The Thain's Book

Dorwinion — Encyclopedia Arda