Jo, jo, JO, or J.O. may refer to:
John Felix Anthony Cena Jr. (/ˈsiːnə/; born April 23, 1977) is an American professional wrestler, rapper, actor, and reality television show host.
Joseph Vissarionovich Stalin (/ˈstɑːlɪn/; 18 December 1878 – 5 March 1953) was the leader of the Soviet Union from the mid-1920s until his death in 1953. Holding the post of the General Secretary of the Central Committee of the Communist Party of the Soviet Union, he was effectively the dictator of the state.
Johnny Cash (born J. R. Cash; February 26, 1932 – September 12, 2003) was an American singer-songwriter, guitarist, actor, and author.
Jordan (/ˈdʒɔːrdən/; Arabic: الأردن Al-Urdunn), officially The Hashemite Kingdom of Jordan (Arabic: المملكة الأردنية الهاشمية Al-Mamlakah Al-Urdunnīyah Al-Hāshimīyah), is an Arab kingdom in Western Asia, on the East Bank of the Jordan River.
John Winston Ono Lennon, MBE (born John Winston Lennon; 9 October 1940 – 8 December 1980) was an English singer and songwriter who co-founded the Beatles, the most commercially successful and musically influential band in the history of popular music.
John Sidney McCain III (born August 29, 1936) is an American politician who currently serves as the senior United States Senator from Arizona.
John Joseph Travolta (born February 18, 1954) is an American actor, producer, dancer, and singer. Travolta first became known in the 1970s, after appearing on the television series Welcome Back, Kotter (1975–1979) and starring in the box office successes Saturday Night Fever (1977) and Grease (1978).