The Tosny family was a prominent noble family in medieval Normandy, known for their influence and land ownership. They played a significant role during the Norman Conquest of England in 1066, with members serving as loyal supporters of William the Conqueror. One of the most notable figures from the Tosny family was Roger de Tosny, who was granted extensive lands in England after the conquest. The family continued to be involved in various political and military affairs throughout the Middle Ages, contributing to the feudal system and the development of the English nobility.