John I Margrave of Brandenberg

• Birth: about 1213
• Death: 4 April 1266
• Father: Albert II Margrave of Brandenberg
• Mother: Matilda of Groitzsch

• Partner: Sophia of Denmark
  Marriage: 1230
•   Child: John II Margrave of Brandenberg
•   Child: Otto IV Margrave of Brandenberg
•   Child: Conrad I Margrave of Brandenberg
•   Child: Eric of Brandenberg
•   Child: Helene of Brandenberg
•   Child: Hermann of Brandenberg

• Partner: Brigitte Jutta of Saxony
  Marriage: 1255
• * Child: Henry I Margrave of Brandenburg-Stendal Born: 21 March 1256 ⇒
•   Child: Agnes of Brandenberg
•   Child: Matilda of Brandenberg
•   Child: Albert of Brandenberg
* Our research indicates that this child is Janet's ancestor.

Ancestors of John I Margrave of Brandenberg

Descendants of John I Margrave of Brandenberg

• 1 John I Margrave of Brandenberg
= Sophia of Denmark Marriage: 1230
• 2 John II Margrave of Brandenberg
• 2 Otto IV Margrave of Brandenberg
• 2 Conrad I Margrave of Brandenberg
• 2 Eric of Brandenberg
• 2 Helene of Brandenberg
• 2 Hermann of Brandenberg
= Brigitte Jutta of Saxony Marriage: 1255
• 2 Henry I Margrave of Brandenburg-Stendal
= Agnes of Bavaria
• 3 Sophia of Brandenburg-Stendal ⇒
• 2 Agnes of Brandenberg
• 2 Matilda of Brandenberg
• 2 Albert of Brandenberg