Saint Mac Nisse[1] (died 514) was an early Irish saint known as the founder and first bishop-abbot of Connor (Irish: Condere, in what is now Co. Antrim). In the Tripartite Life of St. Patrick, he is said to have been a disciple of St. Olcán, Bishop of Armoy.
His story as known is largely legendary[2] He is said to have been baptized by Saint Patrick. He is considered the founder of Kells monastery, having been at Kells as a hermit. His feast day is 4 September[3]