Galadwen (died Third Age 1344) was also known as Vidumavi. She was the daughter of Vidugavia, the greatest prince of the Northmen. Galadwen married Valacar, the son of Minalcar, the King of Gondor. She had a child, Vinitharya, later to be known as King Eldacar. Galadwen was one of multiple daughters of Vidugavia but nothing is known of them.
Galadwen met Valacar in her homeland of Rhovanion. He was sent there by his father who sought to attach the Northmen closer to Gondor than they already were. Valacar began to fall in love with the daughter of Vidugavia and his father allowed it, which had never happened before in the history of Gondor, to wed a foreign woman. They had a son, Vinitharya, in Third Age 1255. In 1260 Galadwen was brought by her busband to Gondor from Rhovanion where she was welcomed for her fairness and nobleness. In 1266 she became Queen as her husband inherited the crown and throne of Gondor. Galadwen died in 1344.