Started with the following information-
Harry Francis McCulloch (or McCullough, etc.), son of Francis McCulloch, (born c1841 died 16 Dec.1916), married (14 Sept.1864 Errigal Parish Church, Garvagh) Charlotte Cash (born c1847?).
1. Letitia Margaret McCullough (12 Aug.1865 Garvagh dist.).
2. Caroline McCullough (10 May 1867 Garvagh dist.).
3. Ethel McCullough (20 Nov.1873 Belfast dist.).
Going by Harry's date of death in 1916 and Ethel's birth in 1873 Belfast I searched 1911 census for the family and there's this one-
King's Rd. (Pottinger DED), [Belfast] Down
Henry McCulloch, 66, stationer mfg born Belfast City [name and age fit but birthplace wrong and McCullochs were Church of Ireland]
wife Charlotte, 60, m.37 yrs 8 ch/6 liv., born Belfast City [name and age fit but birthplace wrong and marriage date 10 years too late]
relative Mary Kane, 6, wid., born Co.Antrim
son James McCulloch, 5, paper merchant, born Belfast City
son Edmund McCulloch, 27, book-keeper, born Belfast City
son William McCulloch, 25, stationer mfg., Belfast City
Haven't yet found if the 3 daughters I do know about were still alive in 1911.
Seems unlikely that there were 2 Henry/Harry McCullochs with wife named Charlotte.
Grateful for any help to sort out this branch.