William Fitzhugh (1721–1798), a native of Stafford County, Va., served with Lawrence Washington during the Cartagena campaign and represented Stafford County in the House of Burgesses 1748–58. In 1752 Fitzhugh married Ann Frisby Rousby of Maryland, and shortly thereafter moved to Rousby Hall in Calvert County, Md., although he apparently maintained at least partial residence in Stafford County. Fitzhugh was a planter, but he also served as a member of Maryland's council from 1769 to 1774. In August 1776 Fitzhugh was elected one of Calvert County’s delegates to the ninth convention, which convened to establish a new government for Maryland. He continued representing Calvert County in the Maryland house of delegates from 1777 to 1783 and was speaker of the house from 1778 to 1779. When Rousby Hall burned during the Revolutionary War, Fitzhugh moved to Millmont, in Calvert County.