Hi Terie
My father in law thought there was a connection but as of yet I have not been able to piece it all together. I have Isabella b 1776 married to a John Leydon, and unfortunately that is all I have.
Would love more information if you are happy to share
Regards
Moo
Ok I did have a look online yesterday, looks like the Hawick Archaeological Society had a paper on the Rev Burn in 1919 so might be worth getting in touch with them about it, can't read the whole paper online but did note William Burn died 9th Dec 1826 in his 82nd yr, he married 3rd June 1771 Margaret Ogle, she died 22nd Feb 1836, 2 sons and 3 dau, one dau married Mr Leyden of Denholm. I did find on SP 3 sons and 4 dau. It is Isabella Burn who married John Leyden, a son William Leyden reg 18/07/1811, Cavers. Couldn't find their marriage though.
"The Border Magazine' 1904 Vol 9 has a great article on Rev Burns, I was able to find it online, @ Archive.org.