In 1538, Thomas Cromwell ordered that every parish should keep a record of every baptism, marriage and burial. The details that are included within the registers vary from parish to parish and from clerk to clerk and many registers from the early period have not survived. The original registers are now held with the county archive offices. For dates of surviving parish registers see Cofrestri Plwyf Cymru/Parish Registers of Wales eds. C J Williams and J Watts-Williams (NLW, Aberystwyth, 2000).
From 1598 to around 1860, the bishop sent transcripts of all parish registers to the registrar of the diocese. Not many early transcripts before 1660 have survived from Welsh parishes. For dates of surviving bishop's transcripts see Cofrestri Plwyf Cymru/Parish Registers of Wales eds. C J Williams and J Watts-Williams (NLW, Aberystwyth, 2000).
The marriage bonds enabled a marriage licence to be issued without having to proclaim banns in church on three successive Sundays prior to the marriage. The bonds give interesting details about the two parties including names, dates, location, age and the groom's profession. Only the marriage bonds and affidavits to 1837 have been indexed, but later records are available well in to the 20th century.