Leonard Calvert (1606 – June 9, 1647) was the
First Proprietary Governor of Maryland. He was the second son of
George Calvert, 1st Baron Baltimore, (1579-1632), the first proprietary of the Province of Maryland. His elder brother
Cecil, (1605-1675), who inherited the colony and the title upon the death of their father George, April 15, 1632, appointed Leonard as governor of the
Colony in his absence. Leonard was named after his grandfather, the father of George who was also "Leonard Calvert" of
Yorkshire