Er ist verheiratet mit Mary Drayton.
Sie haben geheiratet am 18. Februar 1776 in South Carolina.Quelle 2
John William Gerard de Brahm is said to have been a Captain in the service of the Emperor before coming to America. In 1751 he aided in establishing a colony of Germans at Bethany Georgia. In 1755 he was employed by South Carolina to reconstruct the fortifications of Charles Town, and thence forward was constantly engaged in important military engineering and surveying. In 1756 he assisted in building Fort London on the western slope of the Appalachian Mountains. In 1757 he fortified Savannah, and erected a Fort at Ebenezer, and in the same year he combined his survey with those of Lt. Governor Bull, to which we owe the first comprehensive map of South Carolina and Georgia. In 1761 he constructed Fort George on Cockspur Island in the Savannah River. In 1764 he was appointed his Majesty's Surveyor General for the Southern District of North America, and in 1765 was engaged in further survey of the Atlantic and Gulf Coasts. When Sir Henry Clinton and Sir Peter Parker made their descent on Charles Town in 1776, we are told that Captain de Brahm had erected on the eastern end of Sullivan's Island the breast work and battery behind which Col. Thomson of the South Carolina Continentals foiled the British General's attempt to cross Breach inlet-an important part of what is known as the Battle of Fort Moultrie, 28 June 1776.
(See McCrady 1775-80 page 145 and Weston Documents connected with So. Car. page 204)
De Brahm must have removed to Philadelphia towards the end of his life, for on July 29, 1791, in a conveyance by himself and Mary, his wife, he is described as "of Philadelphia, Iate of Charleston.
RIN: MH:N1132