Otto I, Count of RIETBERG
He married Adelheid, Countess of Hallermund Bef 1326 . Adelheid, Countess of Hallermund was born at of Hallermunt, Hannover, Prussia Abt 1310 .
They were the parents of 5
children:
Konrad III, Count of Rietberg
born Abt 1325.
Otto, Count of Rietberg
born Abt 1326.
Mathilde, Countess of Rietberg
born Abt 1327.
Adelheid, Countess of Rietberg
born Abt 1328.
Beatrix, Countess of Rietberg
born Abt 1330.
Otto I, Count of Rietberg died 12 Jan 1347 .
Adelheid, Countess of Hallermund died 23 Feb 1342 .