Wife of Húrin and mother of Túrin (S/148), her name was translated “Dark Maiden” (WJ/409), a combination of the element MOR “black” and the suffixal form -wen of gwend “maiden” (SA/mor, wen).
Conceptual Development: In draft notes from the 1910s she was first called ᴱQ. Tiranne (LT2/139), but the earliest Lost Tales themselves, this character was named G. Mavwin (LT2/70). In Lays of Beleriand from the 1920s, her name was revised first to ᴱN. Morwin (LB/22) and then Morwen (LB/104). Her name was N. Morwen in Silmarillion drafts from the 1930s (SM/23, LR/276). The name Morwen also appeared in The Etymologies (Ety/MOR).
mor (stem“dark, black”) + gwend (“woman, maiden”); [Etym. WEN-] since it shows no -d even in the archaic spelling, it probably contains derivative of WEN-, not WENED- stem and the last element is Ilk. gwen (“girl”).