斯温
Svein Knutsson is also mentioned as Sveinn Alfífuson (matronym) and under the epithet "óforsynjukonungr" ("unforeseen king"). In Norwegian, his name is "Svein Knutsson"; in Danish, "Svend Knudsen". Many variations of the name are used, including Sven and Sweyn, from the Anglo-Saxon Swegen. He was the second ruler of Norway by this name, after his grandfather Sweyn Forkbeard.