Haddy is a surname and a given name. Notable people with the name include:
Surname: Anne Haddy (1930–1999), Australian actress, TV presenter and voice artist Arthur Haddy OBE (1906–1989), English recording engineer R. J. Haddy, special effects artist and airbrush dealer
Given name: Haddy Dandeh-Jabbie, Gambian women's rights activist, public speaker and lawyer Haddy Jallow (born 1985), Gambian-Swedish actress, winner of Sweden's top film award John Haddy James (1788–1869), English physician Martin Haddy Khallidden (born 1998), Bruneian footballer Haddy Njie (born 1979), Norwegian singer, songwriter, writer and journalist
See also Haddy Collider, fictional villain in Kiya & the Kimoja Heroes Haddy charr, Salvelinus killinensis, a fish found in some lakes in Scotland