Ari is a popular name in many cultures, and has been used as a first name for many famous people. Ari Meyers is an American actress best known for her role in the television series 'Kate & Allie'. Ari Onassis was a Greek shipping magnate and the husband of Jacqueline Kennedy Onassis. Jackie O, as she was often called, was an American socialite, fashion icon, and the wife of President John F. Kennedy.