Rev. Alban Butler (171173). Volume IX: September. The Lives of the Saints. 1866.
St. Macnisius, Bishop
[First Bishop of Connor in Ireland.1] ACCORDING to Colgan, he was a disciple of St. Olcan, who was disciple of St. Patrick, and died on the 3rd of November, 513. But, in the Annals of Tigernach, and in the ancient scholiast of the Ængusian Martyrology, he is mentioned under the 3rd of September. The annals of Innisfallen place his death in 506. See Colgan, Act. Sanct. p. 375, and Ware, p. 217, also Welde the Bollandist, t. 1. Sept. p. 663. St. Macnisius has a proper mass among those approved for Ireland by Clement XII. printed at Paris in 1734.