title: Jacob Nielsen, Count of Halland
text: Jacob Nielsen (died about 1309) was count of Northern Halland and a great-grandson of Valdemar II of Denmark. His father (Niels Nielsen) and grandfather (Niels Valdemarsen) had both held Halland as a county before him. Jacob received Halland in 1283, but switched allegiance to the King of Norway two years later and was declared an outlaw in 1287 after the murder of Eric V of Denmark.
  
  In Halland, Jacob built the fortresses of Hunehals and later Varberg Fortress. Jacob's position weakened after the Norwegian king started to lose interest in the conflict with Denmark, and in 1305, he was forced to relinquish Halland to Haakon V of Norway, who granted it to his own son-in-law, the Swedish duke Erik Magnusson.
  
  Bibliography
  Kr[istian] Erslev, "Jacob, Greve af Nørrehalland", Dansk biografisk leksikon, VIII. Bind. Holst - Juul, 1894, p  336 f.
  
  13th-century births
  14th-century deaths
  Danish nobility
  House of Estridsen
  Halland
  Regicides
  13th-century Danish nobility
  14th-century Danish nobility