Jefferson Columbus Davis (March 2, 1828 – November 30, 1879) was a regular officer of the United States Army during the American Civil War, known for the similarity of his name to Confederate President Jefferson Davis and for his killing of a superior officer in 1862.
Jefferson Columbus Davis met President Jefferson Davis.
The article did not say if the two individuals ever met or not. I think the system has a hard time distinguishing between people with similar names.