Irish abbot, monastic founder, and missionary who contributed to the conversion of the Picts. He is one of the most popular Celtic saints in Scotland (where he is called Kenneth) and in Ireland (where he is called Canice) and patron saint of the diocese of Ossory in Ireland.

Much of what has been written about his life is based on tradition. He is said to have studied under the abbots Finnian at Clonard, County Meath (543); Mobhi at Glasnevin, County Dublin (544); and Cadog at the important Welsh monastery at Llancarfan, Glamorganshire, where he was ordained priest in 545. He is thought to have visited Rome.

Kenneth was a close friend and associate of the celebrated Columba of Iona, whom he accompanied to the Scottish mainland to help Christianize the Picts. Near Inverness they met the Pictish king Brude Mac Maelchon, whom Kenneth allegedly paralyzed with the sign of the cross when he threatened them; Brude and his kingdom subsequently were converted.

Kenneth is also known to have ministered extensively in the offshore Scottish Hebrides islands. Testimony to his influence and travels is found in monastic and church ruins (e.g., Kil-Chainnech on Tyree Island) and places dedicated to his name, particularly the islet Inchkenneth. According to tradition, he established the ecclesiastical settlement that later developed into the royal Scottish burgh of St. Andrews, Fife.

Returning to Ireland (c. 577), Kenneth founded monasteries at Aghaboe and at Kilkenny, the capital of the kings of Ossory. The Cathedral of St. Canice in Kilkenny is believed to occupy the site of Kenneth's original church, and the Gaelic name of the city itself (Cill Choinnigh) means Church of St. Canice.

The son of a bard, Kenneth was also a poet. His commentary on the Gospels is commonly known as Glas-Choinnigh.