Personally I think all the McCallions in Inishowen are related to each other. I go round in circles trying to figure out my DNA matches

So far I have the following for Michael McCallion and Sarah McLaughlin. The birth dates for some of them are approximates as the records don't exist and are based on age at death.
1 Sarah McCallion (abt 1858-1929) who married Michael Grant (abt 1858-1947) in 1889.
2 John McCallion (abt 1861-1941) that I mentioned above that married Mary Ann McDaid (1864-1908)
3 James McCallion (abt 1862-1923) He never married.
4 Philip McCallion (abt 1863-1944) who married Rose McDaid (abt 1884-1985) in 1905. She obviously was a lot younger than him.
5 Mary McCallion (1866-1932) who married Patrick Doherty (abt 1864-1916) in 1901
6 Ann "Annie" McCallion (abt 1868-1945). Never married.
7 Michael McCallion (1868- ) Have no info on him except a birth record.
8 Fanny McCallion that you already know about.
9 Catherine "Kate" "Kathleen" McCallion (1872- ) that married Owen "Eugene" McDaid (abt 1876-1907) in 1897. In 1911 she is still in Derry and living with her is my great aunt Mary Bradley from Meenamullaghan.
You probably have most of this info.
mab