Urwen was later named Lalaith after the Nen Lalaith, a stream that ran by Húrin's house in Dor-lómin, because she was a happy child and brought much joy to the hearts of the household of Húrin during her short life. Her hair was yellow like the lilies that grew in the grass and was compared to an Elven child by most people. Túrin loved his little sister but played with her seldom and liked better to guard her unseen as she ran and played with song, but she was killed by a plague which came to Hithlum from Angband when she was still an infant.