Hi Valerie,
Welcome to irelandreachingout, my name is Seamus Callaghan and I tend to help out whenever I can on various Donegal Queries. I was born and have lived in Donegal, but I would not be nearby to where I thick your Kilfoyle family may have come from in Donegal. I have done a bit of research on the Kilfoyle name starting far back in the late 1700s and working my way forward and his is what I have found. I added research on Dawson family also as it is an interesting name I haven't heard all that often.
1790s
Irish Flax Growers, 1796 – List of names
The Irish Linen Board published a list in 1796. Spinning wheels were awarded based on the number of acres planted. People who planted one acre were awarded 4 spinning wheels and those growing 5 acres were awarded a loom . Donegal and Tyrone had the highest number of awards.
Here is the link - http://www.failteromhat.com/flax1796all.php
There is only one Kilfoyle on that list, a Lesley Kilfoyle, from near Donegal, Donegal
There is only one Dawson on that list, a John Dawson, in the parish of Kilbarron,Donegal
1830s
No record of any Kilfoyle or Dawson famiies in residence in Donegal – however due to the difficult transciptions and mis-spelling off the names could throw this search.
1850s
There is only one Kilfoyle family living in County Donegal when the 1857 Griffith Valuation was taken.
1857 Griffith Valuation – Kilfoyle name CLICK HERE
There is a few Dawson families living in South County Donegal when the 1857 Griffith Valuation was taken.
1857 Griffith Valuation – Dawson names CLICK HERE
I have attached a few photos to guide you do this search yourself, as that way you can be sure I am not missing anything. The webpage when searching the Griffith Valuation is this.
You can search by name or location. www.askaboutireland.ie/griffith-valuation - Search
Regarding Kilfoyle, I have come across only one head of family in the whole of donegal and his name was Archibald Kilfoyle, in the Townland of Ogherbeg, in the Parish of Killymard, which is not far outside Donegal Town.
I am attaching you screenshots of the Plot of land he had (23b) and a google map link dropping you exactly at the location where the house would have stood. There unfortunatly does not appear to be any house or old wall stead or even ruin of a house knocked down, but standing on the actual ground in that location would perhap show that better.
There may well be knocked down remanence of a house or building within the bushes near the roadside. You can see the small lined forest on the opposite side of the field and this is how we know we are standing at the exact right location when compared to the old 1850’s map.
GOOGLE Map - View standing on roadside looking across at small line of forest
GOOGLE Map - Location finder
I do hope this might be of some help to you.
Best Regards Seamus Callaghan