Sárnait, also known as Surney of Drumacoo or Sourney, was a 6th-century Irish saint.
[1] Surney was an associate of Colman mac Duagh, who was the bishop of the locality at the time.
Her background is unknown, but may have been a name of Uí Fiachrach Aidhne like Colman.
Surney was the founder of the church of Drumacoo, in the parish of Ballinderreen, County Galway around 550.
[1] A later medieval church, now disused, now stands on the site of the original foundation.