Guinness is a surname of Irish origin. Guinness (drink) is also a famous Irish brand of beer.
It may also refer to:
Businesses Guinness Brewery, Dublin, Ireland Guinness Mahon, a merchant bank Guinness Peat Aviation, an aircraft leasing company Guinness Peat Group, an investment holding company
People Guinness (surname) Guinness family, descendants of Arthur Guinness and his brother Samuel Guinness
Sports Guinness GAA, a former Gaelic Athletic Association club Guinness Premiership, a rugby union competition, sponsored by Guinness between 2005 and 2010
Other uses Guinness World Records, a reference book Guinness baronets, titles The Guinness Partnership, a housing association and charity
See also Guinness-on-Sea