Calvert \c(a)-lve-rt, cal-vert\ as a boy's name is pronounced KAL-vert. It is of Old English origin, and the meaning of Calvert is "cowherd, cowboy". Occupational name and English surname. In America, borne by George Calvert, founder of Maryland. The Calvert dynasty, George, Cecilius, and Charles, ruled the colony of Maryland from 1632 until 1689. Their proprietarship of Maryland ended when, as Catholics, they were ousted by the new Protestant regime in England.
Calvert has 1 variant form: Calbert.