Mo Ling was the second Bishop of Ferns in Ireland. The town of Monamolin in County Wexford is named after him, as is the parish church in Ballycanew.
Many churches were founded by Mo Ling, the most famous being St. Mullin's in County Carlow. Many miracles have been attributed to him. St. Moling dedicated a holy well at Ferns known as Maodhóg's Well in memory of St. Aidan, or St. Maodhóg, the Patron Saint of the Diocese of Ferns.
According to the Annals of the Four Masters, Moling died in 696 AD and his feast day is celebrated on the 17 June. The Patron takes place in Monamolin on the Sunday closest to this date.
John O'Donovan in his Ordnance Survey Letters of 1840 tells a story of St. Moling crossing a small hill in the district when an evil spirit annoyed him. He knelt on a rock to curse the spirit, leaving the impression of his knees on the stone. While there is no account of the stone today, it is said that the incident gave the name to the townland of Cloch na Mallacht (meaning "the stones of the curses"). St. Moling's Well is situated on the parochial lands at Glebe.