Sadhbh

thumb|Illustration of Sadhbh by Arthur Rackham, 1910

In Irish mythology, Sadhbh or Sive ( ) was the mother of Oisín by Fionn mac Cumhail. She is either a daughter of Bodb Derg, king of the Síd of Munster, or may derive in part from Sadb ingen Chuinn, daughter of Conn of the Hundred Battles.