Forgot to mention that I could only find one child for Thomas Watterson and Catherine Blackburn, and this was a Thomas born illegitimate in 1722. Thomas and Catherine married 8/2/1723 in Malew, but no sign of any more children.
I could only find the following births for John W & Jane Quayle:

1749 William
1751 Thomas
1754 Patrick
1756 Margery Isabel
1760 Catherine

David