This Parish of Kilmoon is called in the original language Cill Múdhain, which certainly means the Church of St. Muadanus, but I have no clue for ascertaining which of the Saints of that name it was called after. Does Colgan mention any St. Modanus, Muadanus or Muganus of Dalcassia or of Boirinn?
The old Church of St. Mudanus stands in the Townland of Kilmoon west. It measures fifty two feet in length and eighteen in breadth, but all its features are destroyed, so that nothing remains to guide the antiquarian in his conclusions as to its age but the character of the masonry, which looks ancient. There is a stone near it exhibiting a mitred head from which it might perhaps be concluded with some safety that the Patron of this Church was Muadanus, Bishop of Errigal Muadhain, whose day fell on the 30th of August. But this cannot be directly tested, for though there is a Holy Well near the Church, to the west, dedicated to St. Moon.
A short distance to the east of the Church is a standing stone called The Cross, measuring eleven feet six inches in height, thirteen inches in breadth and eight inches in thickness. It was perhaps originally a rude Cross, though it has little appearance at present of its having ever been one.
Both the Holy well and Standing stone are located on private property.
The Ruins of Kilmoon Church is the beginning of the County Clare mystery novel "Kilmoon" written by the American novelist Lisa Alber who made her debut with this book. Lisa stayed in the region for a while to do some research for the Kilmoon novel and again for the new book that will come out in 2017.