Ida de Tosny was a notable figure in medieval England, known for her marriage to Robert de Tosny, a prominent Norman lord. She lived during the 11th century and was part of the Norman aristocracy following the Norman Conquest of England in 1066. Her lineage is often linked to the influential Tosny family, which played a significant role in the establishment of Norman power in England. Ida is also recognized for her connection to the Benedictine monastery of Saint-Evroult, where she was a benefactor. Her contributions to the church and her family's legacy reflect the intertwining of noble lineage and religious patronage during this period in history.