The couple’s marriage certificate should tell you a little more about them, including father’s names for example. You can view the original certificates on-line on the GRONI website, using the “search registrations” option:
https://geni.nidirect.gov.ukYou will need to open an account and buy some credits. It costs £2.50 (sterling) to a view a certificate.
Daughter Sarah was born 7.11.1864 in Market St. Omagh. See:
https://civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1864/03596/2325985.pdfJames was born 4.2.1867 at Abbey St, Omagh.
Joseph was born 9.1.1869 in Lisnaskea.
George was a Presbyterian. His birth was long before the start of statutory birth registration so you would need to search church records. That might involve a trip to PRONI in Belfast to go through Presbyterian records held there. The fact that George was in Lisnaskea in 1869 is perhaps a hint as to where he came from in Fermanagh. The two nearest Presbyterian churches to Lisnaskea are Cavanaleck (baptisms start 1853) and Maguiresbridge (baptisms from 1860). So if that’s where he originated you may not find any record of his birth.
There is a George Glover death, aged 63, on the GRONI site for 7.6.1901 and that’s matched by a burial in the City Cemetery which gives Harvey St as his address. Also buried there was Mary Ann Glover on 19.8.1891 aged 44. The death certificate describes her as wife of George Glover a shoemaker. Her age there was 42. Address was 29 Blackstaff Rd. So did George marry twice? (I see a death for a Jane Glover in Lisnaskea on 16.10.1874 aged 33).
3 more children to George & Jane:
Margaret 6.1.1870, William 18.4.1872 & Charlotte Elizabeth 6.4.1874. All born in Lisnaskea.
I noted a William Glover in Brookborough who was also a shoemaker. He was married to Catherine Maguire, and they had some children around the same time, registered in Lisnaskea.