Philippe DeJean (1736 – c.1809) was a judge in Fort Detroit until he was captured during the American Revolution. He was born 5 April 1736 in Toulouse, France, the son of Philippe Dejean and Jeanne de Rocques de Carbouere. His father was a legal officer, and may have given his son legal training. DeJean was living in North American by 1761, and was a merchant in Detroit by 1766. By that time, the Seven Years War between Great Britain and France was over, and DeJean was under the jurisdiction of Great Britain. He was appointed Justice of the Peace in April 1767.