Well, he was Cornish and his sister was called Alice. But Husband unearthed much more of interest just a little further back up the tree.
Chegwidden was one of the derivatives of the Chenowyth - spelling in parish registers wasn't a particularly strong point - family name and, in fact, my 5th great-grandmother was Elizabeth Chenowyth.
Now if you're a fan of Poldark that name will ring a bell. Here she is, Elizabeth Chenowyth. Can you see the family likeness?
No? Well, maybe here in the family matriarch.
Yes, that's more like it!