One of the first lords of Wemmel of which there is a historical record was marshal Goswinus van Wembelne, who lived at the beginning of the 12th century. His descendants would be the lords of Wemmel until the end of the 12th century, when Isabella van Wembelne married Aernout II of Kraainem, and Wemmel became part of the already considerable possessions of Kraainem. Many notable men would come from this noble family, including Aernout III, who would die fighting on the French king's side at the Battle of the Golden Spurs. His son Leo was a skillful diplomat, who would sign the 1366 treaty that resolved a dispute between the County of Flanders and the Duchy of Brabant over the Lordship of Mechelen.