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.
The parish of Llanfihangel Glyn Myfyr comprises the township of Cefn Post (in Merionethshire); and the townships of Maes yr Odyn, Llysan, and Cysilog (or Llysyllog) in Denbighshire. [Information taken from http://www.genuki.org.uk/big/wal/DEN/LlanfihangelGM/index.html (last accessed June 2015)]