, ▁Bishop ▁of ▁Ar mo y . ▁ ▁His ▁story ▁as ▁known ▁is ▁largely ▁legend ary ▁He ▁is ▁said ▁to ▁have ▁been ▁bapt ized ▁by ▁Saint ▁Patrick . ▁O eng us ▁Mac ▁N isse ▁is ▁thought ▁to ▁have ▁been ▁at ▁K ells ▁as ▁a ▁herm it ▁earlier ▁in ▁his ▁life . ▁He ▁is ▁considered ▁the ▁founder ▁of ▁K ells ▁monaster y . ▁ ▁References ▁ ▁Primary ▁sources ▁ ▁Tri part ite ▁Life ▁of ▁St ▁Patrick ▁ ▁F é lire ▁Ó eng us so ▁ ▁Ann als ▁of ▁Ul ster ▁ ▁Life ▁of ▁St . ▁N isse ▁( Code x ▁Sal m antic ensis ), ▁ed . ▁W . W . ▁He ist , ▁V ita e ▁San ctor um ▁Hi ber nia e ▁ex ▁cod ice ▁o lim ▁Sal m antic ens i ▁n unc ▁Bru x ell ens i . ▁Br uss els , ▁ 1 9 6 5 . ▁p .   4 0 6 . ▁Short , ▁late ▁hom ily ▁for ▁the ▁saint ' s ▁festival ▁( 3 ▁September ) ▁at ▁Con nor . ▁ ▁Category : Pre - di oc es an ▁b ish ops ▁in ▁Ireland ▁Category : 6 th - century ▁Christian ▁sain ts ▁Category : 5 1 4 ▁death s ▁Category : 5 th - century ▁Irish ▁people ▁Category : 6 th - century ▁Irish ▁people ▁Category : Med ieval ▁sain ts ▁of ▁Ul ster ▁Category : Pe ople ▁from ▁County ▁Me ath ▁Category : Pe ople ▁from ▁County ▁An trim ▁Category : Year ▁of ▁birth