Could this be your couple, you might like to read through this ebook and compare names/facts
"David Seton of Blackhall had also an
illegitimate son, called David, who became
Bailie of Kennoway, and to whose memory there
is a handsome monument in the churchyard of
that parish, bearing a monogram composed of
the letters ' D. S.' and ' I. W.', and an epitaph,
in which he is described as ' Homo pietatis et
justitias amator.' He died in 1733. By his wife,
Isabella Williamson, whom he married in 1702,
he had six sons and three daughters, most of
whom left descendants, including Alexander-
Brodie Seton of Glasgow, Dr. Elphinstone Seton
of London, the Rev. Dr. Craik, Moderator of
the General Assembly of the Church of Scotland"
http://archive.org/stream/historyoffamilv200seto/historyoffamilv200seto_djvu.txtDavid Seton of Blackhall, he must have recognised his illegitimate son? I'm having the same problems with my Scottish famlies as I get back into the 1700's. It seems these records are not on SP but in Parish books in churches they are so old
