Lawrence Washington was a soldier and prominent landowner in colonial Virginia. As a founding member of the Ohio Company of Virginia, and a member of the colonial legislature representing Fairfax County, He also founded the town of Alexandria, Virginia on the banks of the Potomac River in 1749.
Lawrence is believed to have been born in 1718, the second child of Augustine Washington and Jane Butler The family was then living in Westmoreland County, Virginia, along the Potomac River. In 1729, Augustine took Lawrence and younger son Augustine, Jr., to England and enrolled them in the Appleby Grammar School in Westmoreland. Augustine would return to Virginia months later and discover that his wife had died, leaving daughter Sarah in the care of the extended Washington family in Westmoreland County. His father remarried in 1731, to a young heiress, Mary Ball.
Source: Wikipedia