Kings of Denmark (The Kalmar Union)

Until the Treaty of Rae and the New Act of Union (both 1846) the various crowns of Denmark, Viken, Estonia, Pomerania, Lower Saxony and Rugia were all possessions of the Estridsson family though kept separate. After this date all territory was solely tied to the Crown of Denmark.

Denmark
Danish kings are normally dated from Cnut I, those preceding are regarded as unhistorical or local kings at best.

Magnus I died in Autumn 1047 planning an invasion of Anglia. Cnut II's sister Estrid skillfully seized the treasury in Odense and pushed for her son Sweyn to be crowned quickly. The haste was seen as indecent by many contemporaries but it lasted. And so began the longest surviving ruling dynasty in the world.

Viken
Viken's kings and queens are normally dated from the break up of Harald Fairhair's Norwegian union.

Interegnum (1302-1304). The Principality of Rugia is inherited by Wizlaw II's eldest son Sambor but disagreements with the Bishop of Oslo prevent his coronation in Viken. After his short life his brother Wizlaw succeeds and is recognised by the Viken nobles.

Viken's territory (Viken, Svealand, Finland and Rugia) is inherited by her son, Eric VIII of Denmark, on Elizabeth's death. Thereafter they are held in personal union with the Danish crown. The New Act of Union (1848) abolishes it as separate title.