I have not as yet found any connection to Denny itself but there is to both Bonnybridge and Falkirk.
My Grandmother was Agnes Gillespie who died in Lime Road, Camelon in 1917.
I had a cousin who was John Muirhead Gillespie who was the third generation to farm at Bonnyfield Farm.
This family seems to have originated in St. Ninians.
If this represents a connection for you or you have questions, please send me a P.M. as I do have a fairly lengthy list of names.
Susan Gillespie was born at Gartclush farm, St. Ninians.
Since the above post in 2006, I have discovered a great deal.
Regards,
Rob.