This is very interesting for me too. My grandfather was a Burnett , originally Burnet, and I've traced them back to mid 1700s. I saw Bonshawside, thinking it was a place, but wondered if in fact it was a farm since the Burnets were tenant farmers. Mary irving was married to James Masterton and their daughter Jean married the eldest Burnet I can trace back. That is my direct line. Jean's brother William married Elspeth Burnett in 1786. He was born at Bonshawside. They seem to have lived on Peatknowes Farm as did so family in the next 50 or 60 years
I was wondering if brother/sister married brother/sister. I can't get back much further though found some other inscriptions from Dornock graveyard. I wonder if my Mary Irving is related to the Bonshaw ones ?