The Dukes of Mecklenburg pursued from the 14th century a claim to inheritance in Sweden. The Duke of Mecklenburg was a descendant and the heir of two women whom legends tied to Scandinavian royal houses: • Lord
Henry II of Mecklenburg's paternal great-grandmother, a Scandinavian noblewoman named Christina, the wife of
Henry Borwin II, Lord of Mecklenburg (d. 1226), was a daughter of King
Sverker II of Sweden by his first wife. Christina was the mother of
John I of Mecklenburg, whose son was
Henry I, Lord of Mecklenburg. • Lord
Henry II of Mecklenburg's maternal grandmother, a lady named Marianna, was the first wife of Duke
Barnim I of Pomerania (d. 1278), Lord of
Wolgast, as well as sister of King
Eric XI of Sweden. Marianna had given birth to an only surviving child, a daughter named Anastasia of Pomerania, who then became the wife of
Henry I of Mecklenburg (d. 1302) and mother of Henry II. The
Sverker dynasty had long been extinct, having lost the throne ultimately to Eric XI. The male
dynasty of Eric X was already extinct, and issue of his other daughters had been sidestepped by
Birger Jarl, the husband of his daughter (the only one still alive in 1250),
Ingeborg Eriksdotter of Sweden. Birger took great care to secure the kingship for his own sons. The Dukes of Mecklenburg's claim to the Swedish throne became reality during a brief reign: Henry II's son
Albert II, Duke of Mecklenburg (1318–79), married a kinswoman, a Scandinavian heiress named
Euphemia of Sweden and Norway (born 1317 and died 1370). The couple's second son duke
Albert III deposed his uncle from the Swedish throne, and ascended as king.
Margaret I of Denmark chose
Eric of Pomerania as her heir. Eric descended from the elder brother of Albert III. Monarchs of the Kalmar union were all
cognatic descendants of the House of Mecklenburg. The
agnatic House of Mecklenburg, descended from Euphemia's youngest son
Magnus I, Duke of Mecklenburg, continued to keep their claim to the throne, and occasionally stirred the situation in Scandinavia. == Claims to Norway ==