Niall Brigant is a fictional character from The Southern Vampire Mysteries by author Charlaine Harris. He first appears in From Dead to Worse. He is Sookie and Jason Stackhouse's great-grandfather and Claude and Claudine's grandfather. He is tall and slim, extremely handsome with long pale gold hair. Sookie describes Niall as being a lovely creature and having some age to him.^[1]

He tells Sookie that his son, Fintan, and Sookie's grandmother, Adele, had two children: Corbett (her father) and Linda (her aunt and Hadley's mother). Adele's husband could not give her children due to a prior bout with mumps, which left him sterile. Niall is a fairy prince who has powerful enemies and wants to keep his new relationship with his great-granddaughter secret to protect her.^[2] In Dead and Gone it is revealed Niall's nephew, Breandan, is out to kill all those humans who have fairy blood in them and that, for a long time, Fintan was able to keep Sookie's whereabouts secret. It is this desire to destroy that leads to a Fairy War.

In the television series True Blood, which is based on The Southern Vampire Mysteries, Rutger Hauer portrayed Niall Brigant.^[3]