In Irish mythology, Sadhbh 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.

She was enchanted into the form of a deer on refusing the love of Feár Doirche, but she found he had no power over her while she was within the dún of the Fianna. Bran and Sceolan, Fionn's hounds, did not attempt to kill her when the Fianna found her out hunting. She was brought home, but later she was lured out from the protection of the house and she was enchanted once more, by the Druid Fear Doirche. After seven years, the hounds found a little boy, Oisín, Sadhbh's son, who remembered his deer-mother. She was made to follow Feár Doirche and leave her son to the elements.

Oisín, her son, grew up to become a member of the Fianna alongside his father, Fionn.

'Sadhbh' was also the daughter of the High King of Ireland, Brian Boru.

Derived from Proto-Celtic *sŭādŭā ‘the sweet and lovely (lady)’ (adjective) ^[1], the name is cognate with the initial elements in the attested Gallic names Suadu-gena and Suadu-rix and with Sanskrit svādú-, Ancient Greek hedýs, Latin suāvis, Tocharian B swāre and Modern English sweet

'Sive' is a famous play by John B Keane.

v • d • e Irish mythology: the Fenian Cycle Supernatural figures Abartach • Aengus • Aillen • Manannán mac Lir • Mog Ruith • Niamh • Plor na mBan • Sadb Fianna Caílte • Conán • Cumhall • Diarmuid • Fionn • Goll • Liath Luachra • Oisín • Oscar Others Bodhmall • Cormac mac Airt • Finn Eces • Gráinne • Liath Luachra Locations Tír na nÓg • Hill of Tara • Hill of Allen • Benbulben Texts Fotha Catha Chnucha • The Boyhood Deeds of Fionn • Finn and Gráinne • The Pursuit of Diarmuid and Gráinne • Cath Gabhra • Acallam na Senórach • Acallam Bec  • Fianshruth  • Cath Finntrágha part of a series on Celtic mythology

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