Jean Alexandre LeMat
Jean Alexandre Francois LeMat , is best known for the percussion cap revolver that bears his name .
LeMat was born in France in 1821 and studied for the priesthood at an early age. He decided against it and became a doctor. LeMat immigrated to the United States in 1843 and in 1849 he married Justine Sophie LePretre, the cousin of U.S. Army Major Pierre Gustave Toutant Beauregard. Beauregard would lead the bombardment of Fort Sumter in Charleston Harbor in 1861. LeMat was an avid inventor as well as a practicing physician and Beauregard financed some of these ideas.
Source: Wikipedia