Marriage record David Hunter and Mary

Only a small handful of churches in Tyrone have any records for the 1700s. You would need to know the precise location and denomination but even then the likelihood of finding a record is very low. The records you are searching for probably just don’t exist. Researching in Ireland in the 1700s is very hard going due to the general lack of records. If you don’t know where they lived it’s a needle in a haystack. Ideally you need to know the person’s exact denomination and the townland or parish they lived in to have any chance of finding them, and even then there may not be any records for that location.

Possibly DNA testing may be a way of matching with others who have additional information about where the family originate. Family Tree DNA reportedly has more people with Ulster roots than any other company. That obviously increases the chances of finding a match. You might want to try them or, if you have already tested, you can transfer your results to them for no fee.

The North of Ireland Family History Society is running an Ulster DNA project in conjunction with FTDNA and can offer testing kits at a reduced price.  http://www.nifhs.org (Go to DNA project on the website).

Thanks Elwyn;

I knew it was a long shot, especially as I have no clue what Mary's last name was, the only other information I have is they were Presbyterian, so probably Scots/Irish.

This is not my family, I'm documenting all those (1437) interred in a local cemetery and their inter-relationships with each other, David and Mary were one of the first families to settle in the area, they had a significant number of descendants, who intermarried with many of the descendants of the other founding families. 

Presbyterian + Hunter + Tyrone does all point to Scots/Irish origins. So they probably arrived in the 1600s. There are hardly any Presbyterian church records for Tyrone for the 1700s.

Thanks!