The name Jack is a pet name for John, or to a lesser extent Jacob, commonly so in the Northeastern United States and in the United Kingdom. Jack may also refer to:

Charles "Chip" Kelly (born November 25, 1963) is the head football coach at the University of Oregon. Widely regarded as one of the most innovative offensive minds in college football today, the 2009 and 2010 Pac-10 Coach of the Year, 2010 Eddie Robinson Coach of the Year, 2010 Walter Camp Coach of the Year, 2010 Sporting News Coach of the Year and 2010 Associated Press Coach of the Year was previously the offensive coordinator for the Oregon Ducks.

Kelly is a native of Manchester, New Hampshire, attended Manchester Central High School and earned his B.Sc. in physical education from the University of New Hampshire in 1990.

He broke into the coaching ranks in 1990 at Columbia University, where he served as secondary and special teams coach for the freshman team. The next year he was outside linebackers and strong safeties coach for the varsity team. In 1992 he went to the University of New Hampshire as the running backs coach. He left to become the defensive coordinator at Johns Hopkins University for one season. He returned to his alma mater as the running backs coach for the next 3 seasons (1994–96). He changed to the offensive line coach for two seasons (1997–98).

The Script are an Irish rock band from Dublin. Based in London after signing to Sony Label Group imprint Phonogenic, the band released their eponymous debut album in August 2008, featuring the hit songs "The Man Who Can't Be Moved" and "Breakeven". The album debuted at number one in Ireland and the UK. Their second album, Science & Faith, was released in September 2010, and contains the hit songs "For the First Time" and "Nothing". The album debuted at number one in Ireland and the UK, and number three on the US Billboard 200.

Their music has been featured in many video games and many popular television programs including 90210, Ghost Whisperer, The Hills, Waterloo Road, EastEnders, Made in Chelsea and The Vampire Diaries. Frontman Danny O'Donoghue is also a coach on The Voice UK.

Danny O'Donoghue and Mark Sheehan met in a club in The Liberties area of Dublin, Ireland near the Guinness brewery, gravitating to each other through a shared liking of music, and in particular a love of R & B music (Rhythm and Blues). "At that time, MTV only came on in Dublin after midnight, it was the fuzzy channel, and for my generation urban culture was just a wave through us all," explains Sheehan. "It wasn't about gangs and guns; it was fashion and fun, singing and dancing."

Samir Farid Geagea (Arabic: سمير فريد جعجع, also spelled Samir Ja‘ja‘), born October 25, 1952, is a Lebanese politician. He is also a senior figure in the March 14 Alliance, alongside Saad Hariri and Amine Gemayel.

He took leadership of the Lebanese Forces in 1986. After the civil war, there was increased pressure by Syria on Geagea to accept the Syrian presence or face charges.^{[citation needed]} Prior to his arrest, he was contacted by several sympathetic politicians and warned about the forthcoming proceedings and offered safe passage out of Lebanon. In 1994, four years after the end of the Lebanese Civil War, Geagea was tried for ordering four political assassinations, including the assassination of Lebanon's Prime Minister Rashid Karami in 1987, and the unsuccessful attempted assassination of Defense Minister Michel Murr in 1991. He denied all charges, but was found guilty and sentenced to four death sentences, each of which was commuted to life in prison. Geagea was imprisoned in solitary confinement below the Lebanese Ministry of Defense building in Beirut for the next 11 years. He is the only Lebanese militia leader to have been imprisoned for crimes committed during the Lebanese Civil War.