The records of individual ecclesiastical parishes include registers of baptisms, marriages and burials, as well as records of the churchwardens and Parochial Church Councils, parish charities, schools, clubs and societies.
Parish records were deposited at the Clwyd Record Office, following an agreement of 1976 between the Church in Wales and the Welsh County Councils. Following a decision by the Church in Wales to group parish collections by deanery, the records of Cwm were transferred from Flintshire Record Office to Denbighshire Record Office in June 2009
Cwm is one of the ancient parishes of Flintshire, comprising the two townships of Uwchllan and Isllan. The church dates from the fourteenth century, or earlier; although it was rebuilt about 1500. There were restorations in 1881 and 1901. The church is built on a hillside, and the floor is in three levels. The dedication is to Saints Mael and Sulien.
[Information taken from http://www.genuki.org.uk/big/wal/FLN/Cwm/index.html (last accessed June 2015)]