Lamont is of Scottish origin, derived from the Gaelic word "Làmhnachan," which means "wide expanse." It is a masculine given name that has been used sparingly throughout history but gained some popularity in the United States during the mid-20th century. The name Lamont can also be found as a Scottish clan, with the chiefs of Clan MacLehose claiming descent from the Lamonts of that ilk.
The name Lamont experienced a significant rise in popularity from 1972 to 1973, with the number of births nearly doubling from 20 to 21. However, it seems this increase was short-lived as there were fewer births in subsequent years.