The only McGinnis buried in the Vicksburg City Cemetery Confederate section as listed in Confederate Roll of Honor, Known Confederate Dead, Vicksburg Campaign, January 1862-July 1863, Gary W. Webster, "Ol Sow" Publications, 1998, is:

Oscar G, McGinnia, Company C, 2nd Missouri, died July 13, 1863

Oscar G. McGinnis, 17 year old Farmer, enlisted as a Private in Company C, 2nd Missouri Infantry December 4, 1861 at St. Clair County, Missouri/January 20, 1863 at Springfield, Mo, died of wound received in Vicksburg, Mississippi, fought at Elkhorn, Iuka, and Corinth