Jeep was never part of Mitsubishi. Chrysler just had a joint operation with Mitsui during the Eclipse/Talon and Stealth/3000GT years. They shared electronics and engines on several other model lines but was never under Mitsubishi what so ever.
DaimlerChrysler owns-> Maybach, Mercedes, Smart....Chrysler-> Dodge, Chrysler, Jeep....-> Setra, Freightliner, Sterling, Western Star, Fuso, etc... (No longer Lamborghini)
General Motors-> Chevrolet, Pontiac, Buick, Cadillac, GMC, Oldsmobile, Saturn, Hummer, Saab, Holden, Opel, Vauxhaull, Isuzu, Suzuki, etc...
Ford Motor Co.-> Ford, Lincoln, Mercury, Mazda, Volvo, Jaguar, Land Rover, Aston Martin, etc..