Olaf Haraldsson (Old Norse Óláfr Haraldsson, 995 – July 29, 1030) was king of Norway from 1015 to 1028, (known during his lifetime as "the Big" (Óláfr Digre) and after his canonization as Saint Olaf or Olaus). His mother was Åsta Gudbrandsdatter, and his father was Harald Grenske, great-grandchild of Harald Fairhair. In modern day Norway he is known as Olav den Hellige ("Olaf the Holy") or Heilag-Olav ("Holy Olaf") as a result of his sainthood.