Mosby John Singleton (1833–1916), a Confederate leader of irregular cavalry in the Civil War. He was born in Edgemont, Virginia, and practiced law in Bristol. In 1862 he guided General J. E. B. Stuart's cavalry in its raid around the Union army. In 1864 Mosby's Rangers captured Brigadier General E. H. Stoughton inside Union lines at Fairfax Court House. In other raids they captured a supply train and destroyed a section of the Baltimore & Ohio Railroad.

After the war Mosby was consul at Hong Kong, 1878–85, and an attorney for the Department of Justice, 1904–10. He wrote War Reminiscences (1887) and Stuart's Cavalry in the Gettysburg Campaign (1911).