Ingeborg (c. 1300–c. 1360)
Ingeborg (c. 1300–c. 1360)
Duchess of Südermannland. Name variations: Ingebjorg, Ingeburga; Ingeborg Haakonsdottir, duchess of Sudermannland. Born around 1300; died after 1360; daughter of Haakon V (b. 1270), king of Norway (r. 1299–1319), and Euphemia of Rugen (d. 1312); married Eric Magnusson (son of Magnus I, king of Sweden), duke of Südermannland (r. 1303–1318), on September 29, 1312; married Knud, duke of South Holland, on June 21, 1327; children: (first marriage) Magnus VII (II) Eriksson (1316–1374), king of Norway (r. 1319–1343), king of Sweden (r. 1319–1365); Euphemia (1317–c. 1336, who married Albert II, duke of Mecklenburg).
Early in the 14th century, Norway and Sweden were joined into one kingdom under Magnus Eriksson. Magnus was three years old, and the only available heir, when his grandfather, Norway's King Haakon V, died in 1319. The boy's father, Swedish prince Erik Magnusson, had died in prison at the hands of his uncle, King Berger of Sweden. Thus, when Berger was forced out of his kingdom by dissident nobles, three-year-old Magnus became king of both Norway and Sweden. His mother Ingeborg exerted great influence over the affairs of her son, and her plans to enlarge the combined kingdom included designs on Denmark. But the war she provoked with the Danes proved to be so costly to Norway that a popular noble, Erling Vidkunnsson, was made viceroy and ruled Norway until Magnus Eriksson came of age in 1332.