Forannan was a 10th-century Irish priest and the Bishop of Donoughmore. Born into a noble family near Clonmel around 910, he was educated as a Benedictine monk before being elected as bishop. Seeking to follow a divine vision, he departed Ireland around 969 with twelve companions to live in exile. He eventually settled at Waulsort Abbey, where he served as abbot and expanded the monastery's lands. He died in 982, leaving a legacy as a significant figure in the monastic traditions of both Ireland and the Meuse region.