Ok - here we seem to have a little problem.
At the time of marriage (14th MAY 1826 according to my information) Hugh HOSKING was a widower.
At the time of marriage Mary d/o John and Elizabeth Trezise would have been just 18.
Mary was baptised as 'Mary' (not Mary Ann) in 1808.
The witnesses to the 1826 Marriage were William STEVENS and Henry TREVASKIS.
I would have thought that an 18-year-old girl (if still associated with family) would have had, as witnesses, her father or brother or sister.
The 1826 Marriage, I believe, belongs to that of Hugh HOSKING (previously married to Grace MOLLARD) and Mary Ann Trezise.
But I have just realised that Mary Ann was born about 1807 and that Henry TREVASKIS could possibly have been an uncle.
But the question must be asked as to why an uncle would be a Witness rather than father or sibling unless all those relatives were deceased.
I have also just realised (forgetfulness on my part) that we are dealing with marriages prior to July of 1837.
The 1833 of Mary TREZISE to Benjamin BLEWETT had, as witnesses, Thomas Trezise and Thomas Reynolds.
We must remember also that there were 'professional' (or, if you prefer going on PRs) 'serial' witnesses to marriages.
One was often the Parish Clerk and you would see the name repeated in event after event.
But the other was very often a relative - especially, I think, where a girl of 18 was being married in her home Parish and with family still living.
Now, by my records (always willing to stand corrected) I have two children for Benjamin and Mary Blewett.
Elizabeth Ann Reynolds BLEWETT bp. 27th April 1834 at St Erth
John Trezise BLEWETT bp. 21st February 1836 at St Erth
There appears to be enough in this last information to suggest that we are dealing with two different girls here.
From Census and PR records the information I have gathered over the years shows that my last statement is true.
In both cases the girls (Mary and Mary Ann) were married under their Maiden Name.
I have records (above) indicating that Mary who married John BLEWETT) had children in 1834 and 1836 with their names being consistent with (1) her father's name and (2) with the surname of one of the marriage witnesses.
The marriage of Hugh Hosking to Mary Ann Trezise produced, to my current knowledge and investigations, 10 children between 1828 and 1853.
One of those children was, of course, Elizabeth TREVASKIS Hosking as I think has been mentioned in previous notes.
Two different girls but it seems almost certain that the TREVASKIS name comes to the fore in both cases.
Will leave you to think on that whilst I finish my other correspondence, cook something to eat and then watch (maybe) some more episodes of Star Trek. (The Original!).
Hope this helps you rather than confuse you too much.
Ian