Saint Lietbertus (Lietbert, Libert, Liberat) of Brakel (or of Cambrai, de Lessines) (ca. 1010–1076) was bishop of Cambrai from 31 March 1051 to 28 September 1076. Liebertus was born to the Brabantian nobility at Opbrakel (a village in the present-day municipality of Brakel). He served as archdeacon and provost of the cathedral of Cambrai before his election as bishop.