from The American Heritage® Dictionary of the English Language, 4th Edition
- A town of northern Maryland west of Frederick. It is the site of the Civil War Battle of Antietam (September 16-17, 1862), in which Union forces repulsed Gen. Robert E. Lee's troops. The engagement, also known as the Battle of Sharpsburg, was one of the bloodiest of the war, with heavy losses on both sides.
Sorry, no etymologies found.