Colonel Thaddius Riker (1864)
Colonel Thaddius Riker was a soldier in the Union Army during the United States Civil War and a distant ancestor of William and Kyle Riker.
Known to his compatriots as "Old Iron Boots", Colonel Riker was in command of the 102nd New York Infantry during Sherman's March on Atlanta. Colonel Riker was wounded at the Battle of Pine Mountain, near Marrieta, Georgia, in late June, 1864. He was carried back from the front line by another soldier who was actually discovered, in 2372, to be a Q.
Without the actions of Quinn, there would have been no William T. Riker, causing Q to have lost at least a dozen really good opportunities to insult him over the years. (VOY: "Death Wish")