Elizabeth Calvert (1731 – 1788) was the daughter of Maryland Governor Captain Charles Calvert and Rebecca Gerard, and a wealthy heiress in colonial Maryland. Her parents died when she was young, leaving her their substantial fortune. In 1748, aged 17, she married her cousin Benedict Swingate Calvert, a Loyalist politician and planter and the illegitimate son of Charles Calvert, 5th Baron Baltimore.