The father-name of Galadriel (UT/231, PM/346-7). This name is a compound of the prefixal form arta- of arata “noble” and nís “woman”.
Quenya
Artanis
noble woman
artanis
feminine name. Noble Woman
arta
exalted, lofty
arta (1) adj. "exalted, lofty" (PM:354), "high, noble" (PE17:118, 147); cf. names like Artaher, Artanis.
Artanis fem. name "noble woman" (PM:347)