De Brahm, William Gerard (20 August 1718–03 July 1799?), surveyor-cartographer and military engineer, was born in Koblenz, Germany, the son of Johann Phillip von Brahm, court musician to the elector of Triers, and Johannetta Simonet. A member of the lesser nobility, De Brahm secured a broad education that included exposure to the burgeoning experimental sciences of his day. After attaining the rank of captain engineer in Charles VII’s imperial army, De Brahm married and renounced the Roman Catholic faith. Forced to resign his army commission because of his renunciation, he and his bride, Wilhelmina de Ger, found themselves nearly destitute....
