MacSween and McSween are surnames of Gaelic origin. People with those surnames include:
Alexander McSween (1843–1878), Canadian-American participant in the Lincoln County War of 1878 Donald McSween (born 1964), American ice hockey player Harold B. McSween (19262002), U.S. Representative from Louisiana. Harry McSween (born 1945), American geologist and planetologist John MacSween (), Scottish nobleman John Macsween (entrepreneur) (19392006), Scottish butcher and entrepreneur Roderick MacSween (born 1935), Scottish pathologist Susan McSween (18451931), American rancher
See also Macsween (butcher), Scottish food company known for haggis Clan MacQueen, a Scottish clan also known as Clan MacSween Mac Suibhne (surname) 5223 McSween, an asteroid named after Harry McSween Barry MacSweeney (19482000), English poet and journalist McSweeney (surname) Castle Sween, a Scottish castle associated with Clan Sweeney Sweeney (name) Clan Sweeney (also known as Clan MacSweeney), an Irish clan of Scottish origin Mary MacSwiney (18721942), Irish politician and educationalist