Hermann Otto I of Limburg-Styrum

Hermann Otto I of Limburg-Styrum, count of Limburg and Bronckhorst, lord of Styrum, Gemen, Wisch and Borculo, and from 1640 to 1644 advocate of the imperial abbey of Vreden, was born in 1592, and died on 17 October 1644. He was the eldest son of Jobst of Limburg Stirum.

He married baroness Anna Magdalena von Spiess (1599—1659) in 1618 and had four children:

Hermann Otto served in the armies of the Dutch Republic. He commanded Christian of Brunswick's rearguard at the Battle of Stadtlohn (1623) and the Dutch cavalry at the Siege of Groenlo (1627).

At his death, Hermann Otto divided his possessions amongst his three sons.

All members of the House of Limburg-Stirum descend from Hermann Otto, but also a great number of monarchs, such as the present members of the Habsburg-family, the king of Belgium and the Grand-Duke of Luxemburg.