Wikipedia:
AJ, Aj, aJ, or aj may refer to:
People
AJ Alexander, an American model and Playboy PlaymateA. J. Balaban, (1889–1962), co-founder of Balaban and KatzA. J. Allmendinger, an American race car driverA. J. Burnett, an American Major League Baseball pitcher for the New York YankeesA. J. Calloway, an American television personalityA. J. Cook (actress), a Canadian actressA. J. Croce, an American singer and songwriterA. J. Cronin, Scottish novelistA. J. Foyt, an American race car driverA. J. Hawk, an American football linebacker for the Green Bay PackersAndrew Jackson, American general and politician, seventh President of the United StatesAdrienne Janic, an American actress and television hostLee Gi Kwang "AJ", Korean entertainerAJ Michalka, American actress and musicianA. J. McLean, an American singer and member of the band Backstreet BoysA. J. Pierzynski a Major League Baseball catcher for the Chicago White SoxA. J. Price, NBA basketball playerA. J. Raffles, protagonist in many of the works of Ernest William HornungA.J. Styles, ring name for Allen Jones, an American professional wrestlerA. J. Weberman a garbologist, Dylanologist, Yippie and CIA historianAJ Lee, ring name for April Jeanette Mendez, an American female professional wrestlerFictional charactersAnthony John "A.J." Soprano, Jr. (b. July 15, 1986), played by Robert Iler, is a fictional character on the HBO TV series The Sopranos.AJ, a character in the cartoon The Fairly OddParentsApplejack (My Little Pony), a character in the My Little Pony franchise whose nickname is AJ
Places
Apache Junction, ArizonaAzerbaijan (World Meteorological Organization country code and obsolete NATO country code)
Groups, businesses, and publications
Aj (newspaper), an Indian newspaperAl-Jihad, an Egyptian Islamist groupThe Astronomical Journal
Science
Adherens junction, cell-cell junctions between neighboring cellsatto-joule, an International System of Units unit of energy equal to 10 joulesAn inbred strain of mouse
Products, brands, tools
AJ Savage, a United States Navy aircraft built by North American AviationAdjustable spanner