Otto VII was the only son of Count Nicholas II of Tecklenburg and his wife Anna Elisabeth, a daughter of Count Frederick III of Moers.
The attempt failed, and pushed his county deeper into debt.
He died in 1450, and was succeeded by his eldest son, Nicholas III.
Around 1428, he married Ermengarda of Hoya-Nienburg, the daughter of Count Eric I of Hoya.
They had two children: After Ermengarde's death, Otto VII married Aleidis, the daughter of Gottschak VIII of Plesse and had three more children: