Characters from J. R. R. Tolkien's Middle-earth legendarium:

Morwen Edhelwen, wife of Húrin Lord of Dor-lómin and mother of Túrin Turambar

Morwen Steelsheen, spouse of Thengel King of Rohan and mother of Théoden

Morwen (Third Age), daughter of Belecthor I Steward of Gondor and grandmother of Egalmoth

Original character in the The Lord of the Rings film trilogy directed by Peter Jackson

Morwen, a character in the books The Enchanted Forest Chronicles written by Patricia C. Wrede