Asaph was a 6th-century Welsh bishop and monk who is traditionally recognized as the first leader of the diocese of St Asaph. Born in the region of Hen Ogledd to King Sawyl Penuchel and Gwenaseth, he became a disciple of Kentigern. According to historical accounts, he demonstrated his sanctity by bringing live coals to his mentor in an apron. Following Kentigern's departure for Strathclyde, Asaph was consecrated to succeed him, establishing the see in Wales.
Life and legacy

While specific biographical details are scarce, his presence is preserved through numerous Welsh place names near Holywell. He is associated with various landmarks, including a well, a valley, and a church. As a member of a large monastic community at Llanelwy, he served as a presbyter before his elevation to the episcopate. He died in 596, leaving a lasting impact on the religious landscape of Tegeingl.
Veneration

He is honored as a saint within the Catholic and Eastern Orthodox traditions. His feast day is observed on 1 May, though some liturgical calendars in Wales observe his memorial on 5 May. His memory is maintained through various locations named in his honor across the world and a specific hymn tune attributed to him.
