Lietbertus was a 11th-century bishop of Cambrai, born into the nobility of Brabant around 1010. Before ascending to the episcopacy in 1051, he held the positions of provost and archdeacon at the cathedral in Cambrai. His tenure as bishop was marked by significant travels and political struggles, including a failed attempt to reach the Holy Land in 1054. He remained in his office until his death in 1076, leaving behind a legacy of monastic foundation and ecclesiastical defense.