|Region of origin||Ireland, Irish diaspora|
|Related names||Saidhbhín (diminutive)|
Sadhbh (also spelled Sadb, Saibh, Sadbh, Sadhb; anglicised Sive or Saeve) is an Irish feminine personal name. Derived from Proto-Celtic *sŭādŭā '(the) sweet and lovely (lady)', 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 (compare Suada), Tocharian B swāre and Modern English sweet.
The Whiteboys, a secret agrarian organisation in 18th century Ireland, referred to themselves as "Queen Sive Oultagh's children" ("Sive" or "Sieve Oultagh" being anglicised from the Irish Sadhbh Amhaltach, or Ghostly Sally).
- Sadhbh Nic Donnchadh, daughter of Donnchadh, King of Ossory and wife of Ard-Rí Donnachadh mac Flann Sionna; patroness of Saighir
- Sadhbh O'Sullivan, member of the band The Isohels
- "Sadhbh Trinseach", name adopted by Irish nationalist artist Cesca Chenevix Trench
- In Irish mythology, Sadhbh (or Saba) was the mother of Oisín by Fionn mac Cumhail
- Sadb ingen Chuinn was a daughter of Conn of the Hundred Battles, a High King of Ireland
- Sive, a 1959 play by John B. Keane and also the name of its lead character
- Traditional Irish sean-nós song, Sadhbh Ní Bhruinnealigh 
- Irish Names and Surnames by Rev. Patrick Woulfe, 1923
- Indogermanisches etymologisches Wörterbuch page 1039; Delamarre 284; Ellis Evans 1967: 258; Meid 2005: 206f.
- Kenny, Kevin (1998). Making Sense of the Molly Maguires. Oxford University Press. p. 9.
- "Sadhbh Ní Bhruinneallaigh lyrics and chords - SongsInIrish.com". SongsInIrish.com. Retrieved 2017-12-28.
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