Ellen,
Researching ancestors born in the mid 1700s can be very difficult due to the lack of records. Very few churches in Co. Tyrone have baptism records for someone born in 1769.
You have said that you don’t know where in the county Robert comes from, but you also say that you found him as some sort of deacon in Derryloran church. Can you be sure that it’s the correct Robert? Glasgow is a fairly common surname and there may have been several people of that same name alive at the same time. (I looked in the 1901 census of Co. Tyrone and there were 3 people named Robert Glasgow living in the county then. So it would have been similarly common in the 1760s).
Derryloran’s parish records start in 1795, so if Robert married in 1798, you might expect to find Margaret’s baptism in those records 1798 onwards. If she is not there, then it would make me wonder if you have the right family. Tradition was to marry in the bride’s church, after which she’d attend her husband’s, so it’s not unusual to find that a marriage was in one church and the children’s baptisms in another. Obviously if bride & groom both happened to attend the same church, then that’s irrelevant.
There was at least 1 Glasgow family attending Derryloran in the late 1700s as there’s a baptism of James G to Wm & Mary G on 21.8.1799. The 1766 religious census also has 3 Glasgows, 2 James & 1 John in the parish. They were all apparently Church of Ireland and all lived in Drumearn townland:
https://cotyroneireland.com/census/1766derryloran.html
I say apparently because I don’t see any Presbyterians (ie Dissenters) in that list and there were large numbers of Presbyterians living in the parish then, so I am not certain the list is 100% accurate.
I searched the PRONI name base and found a Robert Glasgow of Loy who died around 1823. Probate was granted on his estate on 19.5.1823. He was a gentleman (ie of independent means). So if he’s the same Robert who was the Derryloran deacon, he was still in Ireland in 1823.
Do you know your Robert’s exact denomination? I mention that because looking at the 1901 census, many of the Glasgows in Tyrone, including 1 Robert, were Presbyterian. Maybe your Robert wasn’t Church of Ireland?
You mention hoping for matches through DNA. Family Tree DNA reportedly has more people with Ulster roots than any other company. That obviously increases the chances of finding a match. 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).
