In the mirror universe, Lieutenant Jason McNally was a Terran officer in the Imperial Starfleet during the 23rd century.

McNally served as helmsman aboard the ISS Indomitable and was responsible for taking the ship to H'atoria in order to hunt down a Klingon research base. McNally died in battle alongside the rest of the crew. (TOS - Mirror Universe short story: "Ill Winds")

It is unknown whether or not McNally has a counterpart in the primary universe.
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