Lambert An English surname from the Old French and Old German meaning ‘land bright’, a popular name from the twelfth century introduced from Flanders where St. Lambert of Maestricht was venerated. In 1890 Lambert was principally found in Wexford and Dublin, and the estimated number of bearers was 985. In the United States it is the 292nd most numerous surname with an estimated 101,750 bearers. In England and Wales in 1996 it was the 245th most numerous surname.