Sometime in 504 1A, Nimloth married Dior Eluchîl, her second cousin once removed making her an heir of the Melian, Queen of Doriath. In the few years before the death of Elu Thingol, she lived near the land of Lanthir Lamath at the base of the Blue Mountains northeast. There her children Eluréd, Elurín and Elwing were born.
After Thingol was killed, she went northwest to Doriath with her husband and children where she became the Queen of the Elven realm. She was later slain in the Kinslaying of Menegroth by the Sons of Fëanor along with her husband. Her sons also perished, but her daughter Elwing was able to escape to the Havens of Sirion with many survivors.