Sweyn II of Denmark
Ulf (or Ulf Jarl) (Ulf Thorgilsson) was a Danish earl ("jarl") and regent of Denmark. Ulf was the son of Thorgil Sprakling and the father of King Sweyn II of Denmark and thus the progenitor of the House of Estridsen, which would rule Denmark from 1047 to 1375, which was also sometimes, specially in Swedish sources, referred to as the Ulfinger dynasty to honor him.