What is "maolan"

Maolán was an early Christian bishop in Connacht, whose feast day is given as 25 December. He is commemorated in the placnames Cill Easpaig Mhaoláin (the church of Bishop Maolán) or Killaspugmoylan, parish of Kilconickny, Loughrea) and Cill Mhaoláin (the church of Maolán) or Kilmoylan, a parish four miles south of Tuam.