Jo, jo, JO, or J.O. may refer to:
Joseph Vissarionovich Stalin (born Ioseb Besarionis dze Jughashvili; 18 December 1878 – 5 March 1953) was a Georgian revolutionary and Soviet politician.
John Felix Anthony Cena Jr. (; born April 23, 1977) is an American professional wrestler, actor, and rapper.
Joseph Robinette Biden Jr. (; born November 20, 1942) is an American politician who served as the 47th vice president of the United States from 2009 to 2017. A member of the Democratic Party, he represented Delaware in the U.S.
John Winston Ono Lennon (9 October 1940 – 8 December 1980) was an English singer, songwriter, and peace activist who co-founded the Beatles, the most commercially successful band in the history of popular music.
Johnny Cash (born J.R. Cash, February 26, 1932 – September 12, 2003) was an American singer-songwriter, guitarist, actor, and author.
Jordan (Arabic: الْأُرْدُنّ Al-ʾUrdunn [al.ʔur.dunː]), officially the Hashemite Kingdom of Jordan (Arabic: المملكة الأردنية الهاشمية Al-Mamlakah Al-Urdunnīyah Al-Hāshimīyah), is an Arab country in Western Asia, on the East Bank of the Jordan River.
John Sidney McCain III (August 29, 1936 – August 25, 2018) was an American politician and military officer who served as a United States Senator from Arizona from January 1987 until his death.