┌─John I Count of Oldenburg 

         ┌─Christian III Count of Oldenburg 

         │  └─Richeza of Hoya-Stumpenhausen 

      ┌─John II Count of Oldenburg 

      │  │  ┌─Heinrich IV Count of Wildeshausen 

      │  └─Hedwig of Oldenburg-Wildeshausen 

      │     └─Elisabeth of Tecklenburg 

   ┌─Conrad I Count of Oldenburg 

   │  │  ┌─Conrad Count of Diepholz 

   │  └─Hedwige of Diepholz 

   │     └─Hedwig of Rietberg 

 Conrad II Count of Oldenburg 

   │        ┌─Gerhard I Count of Holstein-Itzehoe 

   │     ┌─Gerhard II Count of Holstein-Plön 

   │     │  └─Elisabeth of Mecklenburg 

   │  ┌─Gerhard IV Count of Holstein-Plön 

   │  │  │  ┌─Valdemar I of Sweden 

   │  │  └─Ingeborg of Sweden 

   │  │     └─Sofia of Denmark 

   └─Ingeborg of Brunswick 

      │     ┌─Gunzelin III Count of Schwerin 

      │  ┌─Nikolaus I Count of Schwerin-Wittenburg 

      │  │  └─Margareta of Mecklenburg in Rostoc 

      └─Anastasia of Wittenberg 

         │  ┌─Barnim I Duke of Pomerania 

         └─Miroslawa of Pomerania 

            └─Mechtild of Brandenburg