Suibne, modern spelling Suibhne (), is a Gaelic male name from which the surname Sweeney is derived.
People Suibne mac Colmáin (died c. 598), Irish king Suibne Menn (died c. 628), Irish king Suibne moccu Fir Thrí (died c. 657), abbot of Iona Suibne son of Maclume (died c. 891), medieval scribe of Clonmacnoise Suibne mac Cináeda (died 1034), King of the Gall Gaidheil Suibne Geilt ("Sweeney the Wild"), protagonist of the Irish language tale Buile Shuibhne (The Madness of Sweeney) Suibhne mac Duinnshléibhe, early 13th century Scottish magnate, eponym of Castle Sween and the MacSweens of Argyll and Ireland Suibne of Skellig, a monk and saint associated with Skellig Michael