The de Lacy family was a prominent noble family in medieval England, known for their significant landholdings and influence. They were particularly active during the 12th and 13th centuries, with members serving as barons and knights. The family held estates in various regions, including Yorkshire and Lancashire, and played a role in the political landscape of the time. One of the most notable figures from the de Lacy family was Henry de Lacy, who became the Earl of Lincoln in the late 13th century. The family's legacy includes contributions to the development of castles and manorial systems in England, reflecting their status and power during the medieval period.