masc. proper name, from French, from German Lambert, from Old High German Lambreht, from lant "land" (see land (n.)) + beraht "bright" (from PIE root *bhereg- "to shine; bright, white."). Old English cognate was Landbeorht. The English popularity of the name 12c. and after probably is due to immigration from Flanders, where St. Lambert of Maestricht was highly venerated. Attested as a surname from mid-12c.
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