in names means ”girl, maiden, virgin”.
Sindarin
rodwen
noun. high virgin noble
rodwen
feminine name. High Virgin Noble
Elements
Word Gloss raud “noble, eminent; lofty, high, tall; excellent” gwend “maiden, maiden, *young woman”
wen
maiden
A name Tolkien briefly considered for Turgon’s sister translated “High Virgin Noble” (WJ/317), a compound of the prefixal form rod- of raud “noble” with the lenited form of gwend “maiden”. It was ultimately replaced by Aredhel; see that entry for further discussion.