Rev. Alban Butler (171173). Volume VII: July. The Lives of the Saints. 1866.
St. Nissen, Abbot in Ireland
WHOM St. Patrick baptized, ordained deacon, and appointed abbot of Montgairt or Mountgarret, in the county of Wexford, on the borders of Kilkenny, of which place he is titular saint. See Colgan in MSS. ad 25 Julij.