Þrúðr, sometimes written as Thrúd, is a daughter of the gods Sif and Thor in Norse mythology. Although her name is mentioned in the Prose Edda, it gives no direct powers or other information about her. Thrúd is also the name of one of the valkyries described in Grímnismál (stanza 36). The two may or may not be the same person. Thrúd is the goddess of the heath, of willows, of trees, flowers and the grass. Her name means strength in Old Norse.