Counts of Louvain
The Counts of Louvain were a branch of the Lotharingian House of Reginar which from the late 10th century ruled over the estates of Louvain or Leuven in Lower Lorraine. Wikipedia
Past holders: Godfrey I, Count of Louvain, Lambert I, Count of Louvain, Henry II, Count of Louvain, and more