Post by Cornish Terrier on Dec 21, 2017 1:08:44 GMT -5
Hi Athegian and Welcome to Penwith Genealogy.
This is not going to be an easy question to answer and you may have to hope that there might be a surviving Will that might provide a clue. The difficulty with this period in Cornwall is that the Vicars of many Parishes, including Crowan, did not bother with the surname of the bride and there are some that did not even note the bride's forename!! Compounding the problem with Crowan is the condition of the registers prior to about 1744 with many pages fragmented, torn or water damanged, some so severely that almost all entries are unreadable.
Another stumbling block with Crowan is that registers only survive from 1695 and although there are Bishops Transcripts they do not cover every year so there are sometimes gaps of 3 or 4 years.
If you can identify all the children of James and Thomasen their names might offer clues to the forenames of Thomasen's parents which might be of some help in identifying a possible surname. The other thing to remember is that the name WATERS often appears in the registers as WALTERS and WATTERS.
You won't know for sure but you may be able to make a guess by looking at the baptisms of a daughter named Thomasin and its variant spellings which would put her at the right sort of age to be a bride in 1718. For example, in Crowan baptisms in the Cornwall OPC database there is a listing for a Thomisin TRENAILER, dau. of Thos., bap 4 Mar 1695 and born 29 Feb who could be a candidate and in fact the only possibility in the list. I'm not sure if this is a BT or a PR entry but as CT has said the early Crowan registers are in a very poor condition. The standard work on Crowan registers must be the Bawden Transcript which indexes entries from combined PRs and BTs but as far as I know it's only available at the Cornwall Record Office or the library of the Cornwall Family History Society, both in Truro.