Grangewilliam is also known as Donaghmore (Domhnach Mór), is a monastic settlement about 1 mile (2 km) outside Maynooth, Co Kildare.The monastery stood here until the about the 11th century. There is the remains of the walls and gable left of the 14th-century church built on the site and a small graveyard. It is surrounded by the Carton Demense. It is famous since in 1902 ago an Ogam stone, was found there by Lord Walter Fitzgerald, the son of the Charles FitzGerald of Carton House, the fourth Duke of Leinster.
The small cemetery encircles the church, one relatively recent burial there, was the former president of St. Patrick's College, Maynooth from 1994-96 Monsignor Matthew O’Donnell who died aged 63 while in office, he was buried in his fathers grave.
There is usually a temporary structure from which the annual blessing of the graves, and mass is conducted.