William Henry Egle (1830-1901) was a physician, historian, and genealogist who worked for the Pennsylvania Telegraph, the Literary Companion, and the Daily Telegraph. He received a medical degree from the University of Pennsylvania in 1859 and worked as a surgeon during the Civil War. In 1863 he became surgeon to the 47th Pennsylvania Regiment, and in 1870 he became surgeon-in-chief to the Pennsylvania National Guard. He wrote many books on Pennsylvania history and his native Dauphin County.