The Wikipedia article of the day for May 9, 2018 is Siward, Earl of Northumbria.
Siward was an 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 relative of Earl Ulf, and emerged as a powerful regional strongman in England during the reign of Cnut the Great (1016–1035). Cnut was a Scandinavian ruler who conquered England in the 1010s, and Siward was one of the many Scandinavians who came to England in the aftermath of that conquest. Siward rose to become a sub-ruler of most of northern England. In the early 1050s he turned against the Scottish ruler Mac Bethad mac Findlaích. Despite the death of his son Osbjorn, Siward defeated Mac Bethad in battle in 1054. More than half a millennium later the Scotland adventure earned him a place in William Shakespeare’s Macbeth. St Olave’s church in York and nearby Heslington Hill are associated with Siward.