Loos Hendricus G., also known as Loos van der Gouw, played a significant role in the Siege of Heemskerk in 1426. He was a member of the Hook Faction and his manor served as a stronghold during the conflict. The siege was a part of the Hook and Cod Wars, a series of civil wars that plagued the County of Holland during the 15th century. The conflict arose from political and economic tensions, with the Hook Faction led by the Van Arkel family and the Cod Faction led by the Van Egmond family.