Johann I (-30 July 1286), Herzog von Sachsen, Engern und Westfalen

Same as
Additional names
Parents
Father:1Albrecht I (-1260), Duke of Saxony
Mother:2Helene von Braunschweig-Lüneburg (18 March 1223-6 September 1273)
Spouses and relationship events
Married:3around 1270Ingeborg Birgersdotter (-30 June 1302)
Children
Children with Ingeborg Birgersdotter:
Johann II (-22 April 1322), Herzog von Sachsen-Lauenburg4
Albrecht III (-October 1308), Herzog von Sachsen in Ratzeburg5
Elisabeth von Sachsen-Lauenburg (-before 1306)6
Helene von Sachsen (-after 13 September 1337)7
Sophie von Sachsen (-1319), Prioress at Plötzkau8
Erich I (-1361), Herzog von Sachsen in Ratzeburg und Lauenburg9
Attributes
Occupation:10from 1269Titular Burggraf von Magdeburg
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