Did a bit more digging the other day but waited until you would see what was listed so far (thank you for the thank-you PM).
Alexander Porter (c1815-1905), Gortamney, son of William Porter, m.(1848) Mary Cousley (c1827-1887). Link to gravestone posted earlier.
Children (not in any particular order)-
1. Annie Porter m.(1879) William Caufield
2. Margaret E Porter m.(1875) Job Fleming
3. Isabella Porter m.(1878) Samuel Ferguson
4. Alexander Porter (c1846?-1925)
5. Samuel Porter (c1873) m. Sarah
?6. Clarke Porter (c1851) m.(1884) Matilda McLean
Annie Porter m.(1879) William Caufield
1. Margaret Jane Caulfield (1881)
2. Annie Mary Caulfield (1882)
3. William Caulfield (1883)
4. Alexander McKenzie Caulfield (1885)
5. John Porter Caulfield (1888)
6. Isabella Caulfield (1890)
7., Matilda Caulfield (1892)
8. Rebecca Jane Caulfield (1894) 1911- with aunt Margaret Fleming
9. Maria Cornelia Caulfield (1897)
10. Robert Caulfield (1899)
11. child
Margaret E Porter m.(1875) Job Fleming (d.bef.1901)
www.census.nationalarchives.ie/pages/1901/Londonderry/Ballymoghan/Roshure/15319741. James (1876)
https://familysearch.org/pal:/MM9.1.1/FGFM-99X2. Alexander Porter Fleming (c1879) m. Sarah
www.census.nationalarchives.ie/pages/1911/Londonderry/Ballymoghan/Killyboggin/612751 1. Job Cousley Fleming (c1905)
3. daughter (1879)
https://familysearch.org/pal:/MM9.1.1/FGNV-CQH4. Samuel Fleming (1881)
https://familysearch.org/pal:/MM9.1.1/FGV9-LH55. Job Fleming (1883)
6. John Fleming (c1886)
7. Robert Fleming (c1887)
8. Willie W Fleming (c1893)
9. Agmondisham Vesy Fleming* (1895)
10. Sinclair Fleming (c1898)
* listed as Vesy in census but birth registered as Agmondisham Fleming- name probably comes from Agmondesham Vesey-
http://www.bartleby.com/221/1502.html