A. J. Cronin, Scottish novelist

Angelina Jolie, an American actress

AJ Price, NFL Defensive end

A. J. Foyt, an American race car driver

Aunt Jemima, a trademark for pancake flour and other breakfast foods

Al-Jihad, an Egyptian Islamist group

Jaguar (car) engines from the 1980s onwards have the designation AJ (Advanced Jaguar) in front of the cylinder configuration.

Armani Jeans, a clothing line by Giorgio Armani

Atari Jaguar, a video game console

Angela Via, an American singer and songwriter

A. J. Allmendinger, an American race car driver

Ask.com, an Internet search engine formerly known as "Ask Jeeves"

Apache Junction, Arizona

Apple Jacks, a breakfast cereal

Adjustable spanner

A. J. Croce, an American singer and songwriter

Apple juice

Aero Contractors Company of Nigeria (IATA airline designator)

The Astronomical Journal

Anup Jalota, an Indian singer

AJ Calloway, an American television personality

A. J. Garrett, a character in the webcomic User Friendly

A. J. Hawk, an American football linebacker for the Green Bay Packers

Andrew Jackson, the seventh President of the United States

Andy Johnson, an English and Everton F.C. footballer.

Amanda Joy Michalka, an American singer, one half of Aly & AJ

Alexander James McLean, an American singer and member of the band Backstreet Boys

A. J. Pierzynski a Major League Baseball catcher for the Chicago White Sox

A.J. Styles (ring name for Allen Jones), an American professional wrestler

A. J. (The Fairly OddParents), a character in the cartoon The Fairly OddParents

Air Jordan, a brand of shoes originally worn by legendary basketball player, Michael Jordan

AJ Savage, a U.S. Navy aircraft built by North American Aviation

An inbred strain of mouse

Azerbaijan (WMO country code and obsolete NATO digram)

attojoule, an SI unit of energy equal to 10^-18 joules