My 'Quick' friend
I would not be overly hasty in coming to such a conclusion.
I, too, have a problem not too dissimilar to your own Glasson one.
We have Trewhela farm in St Enoder and Trewolla farm in Gorran with both having mentions in very early documents such as Domesday. But the most 'useful' that I have seen regarding these two (families in their own right) was the Visitations in which there is a pedigree of the Trewolla family.
There is mention of a son of Trewolla of Gorran marrying a daughter of Trewhela of St Enoder.
There is/was a farm named Trewhela in Cury Parish and I believe another up around Crantock but I know basically nothing of them exept for having seen them on the odd map.
But it is the Trewhella Farm at St Hilary from which I believe my own family came.
Now - the problem is that I have a family of Trewhella in Camborne (beginning with a marriage in 1686) of whom some seemed to settle in Kenwyn and whilst the remainder stayed in Camborne with later links to Illogan and Redruth.
There is a Trewella family at Redruth/Illogan that can be traced back to a mid-to-late 1500's marriage yet there can be found no connection between them and the previously mentioned family.
And ten there is my own family which can be traced with reasonable accuracy back to a marriage at St Erth in 1580.
Again, there is no evidence of a connection to the family of Redruth/Illogan but I am not willing to discount the possibility.
So what we have here, at the moment, are three 'apparently' separate genealogies with the poor old Camborne lot sort of stuck in the middle and with seemingly nowhere to go.
BUT - over the years some clues have emerged to suggest a fairly high possibility that there might actually be a connection to the St Erth (and later Towednack) family.
This very much hinges on one particular Christian Name - CHRISTOPHER.
I do not recall having ever seen this name used in the Trewolla family and the Trewhela family of St Enoder 'seem' to just die out.
Until probably the mid to late 19th Century I had only ever seen this name used in my own family with the ealiest occurrence being the baptism at Towednack 5th April 1702 of Christopher s/o Martin and Alse Trewhella.
Sometime around the 1680's there is evidence of a Christopher Trewhella being involved in one or more Depositions at Towednack and it is possibly this same man who appears to have married a daughter of Christopher Cock, Gent., of Helston.
Christopher Cock had quite a lot of dealings with the St Ives area and seems to have been quite affluent and, I would suggest, important.
In his Will of 1678 Christopher Cock named grandsons Charles, Thomas, Matthew and David Trewheela and the Will was witnessed by Christopher Trewheela.
Is all of this simply coincidence?
I am of the opinion that this last Christopher Trewhella was definitely related to the people at Towednack and also that Charles Trewhella who married Margery Luke at Camborne in 1686 was the grandson mention in Christopher Cock's Will.
The IGI has a record for a baptism at Bodmin of a CHARLLS TREWOLLAR 1st May 1666. (no parent listed)
One slight correction/addition - Thomas and Mary (Edwards) Trewhella baptised sons Christopher (1783-1783) and Christopher (1784-
?) at St Hilary.
Thomas was son of Thomas Trewheela m. Catherine (nee Barns) at Perranuthnoe in 1754 and whose children were all baptised at Ludgvan before settling back at St Hilary and St Erth.
I am yet to find a place for Thomas but he fits into this scenario somehow.