Siward or Sigurd (Old English: Sigeweard) was a great earl of 11th-century northern England. The Old Norse nickname Digri and its Latin translation Grossus ("the stout") are given to him by near-contemporary texts. Siward was probably of Scandinavian origin, perhaps a member of Earl Ulf's kindred, and emerged as a powerful regional strongman in England during the reign of Canute the Great (1016–1035).