Jefferson (Indiana Jones)
"Jefferson" was the alias used by a Soviet soldier working for Colonel Dovchenko. His real name is not known. In Hangar 51, Indiana Jones crashed through the windshield of a truck carrying him and "Grant." Jones threw them both out.
"Jefferson" is probably the character identified as Russian Soldier 4 in the film credits, and his real name is unrevealed, but he is listed under his alias for lack of anything better to call him.