Gerald of Mayo was an 8th-century Northumbrian monk and priest who served as an influential abbot in Ireland. Born in the Kingdom of Northumbria, he was educated by Bishop Colmán of Lindisfarne. Following the Synod of Whitby, he joined a group of Northumbrian monks who traveled to Iona and eventually settled in Ireland. He became the first leader of the monastery at Mayo, a significant center of learning and sanctity. He is remembered as a saint in both the Roman Catholic and Eastern Orthodox traditions.