First found in Surrey where they were descended from the ancient Count of Mons and Louvain, born 940 A.D. died 1004. His three sons were Baldwin, Ralph, and Hugh Lambert. Accompanying Duke William to England at the Battle of Hastings, a Norman chief, Haco Lambert acquired lands from Duke William and is recorded in the Domesday Book. Descended was Henry Fitz Lambert living in 1235 who was a benefactor of the church at Lincoln.

Because of this political and religious unrest within English society, many people decided to immigrate to the colonies. Families left for Ireland, North America, and Australia in enormous numbers, travelling at high cost in extremely inhospitable conditions. The New World in particular was a desirable destination, but the long voyage caused many to arrive sick and starving. Those who made it, though, were welcomed by opportunities far greater than they had known at home in England. Many of these families went on to make important contributions to the emerging nations of Canada and the United States. Analysis of immigration records indicates that some of the first North American immigrants bore the name L'Ambert or a variant listed above: Anne Lambert, who settled in Virginia in 1653.

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