Saint Grwst was a 6th or 7th-century saint who lived and worked within the Welsh kingdom of Gwynedd. Born to a prince of Rheged and a princess of Din Eiddin, he was the great-grandson of King Urien Rheged. Historical accounts suggest he may have been invited to Wales by King Maelgwn Gwynedd to establish a religious cell. Known as Grwst the Confessor, he is recorded as a witness to a charter granted to Saint Kentigern.