Family of English colonists in America, including George (1580?-1632), First Baron Baltimore; his son Cecilius (1605-1675), Second Baron and recipient of the Maryland charter; another son, Leonard (1606-1647), first governor of Maryland (1634-1647); and Cecilius's son Charles (1637-1715), Third Baron and governor (1661-1675) and proprietor (1675-1689) of Maryland.