Now for ones in Coleraine area.
John Douthart (c1826-5 Oct.1906), son of Samuel, m.(5 May 1855) Anne Jane Campbell (c1833-22 May 1881).
1901-
www.census.nationalarchives.ie/pages/1901/Londonderry/Ballylagan/Daneshill/1521941?1. Samuel Douthart (c1857-2 Feb.1889 Penna).
2. William Douthart (c1859-3 Apr.1909 Philadelphia).
3. Sophia Douthart (c1861-26 Aug.1864).
4. Sophia Douthart (31 Mar.1866 Portrush dist.).
5. Ellen Jane Douthart (31 July 1868 Portrush dist.).
Samuel Douthart (c1870) m.(Apr./June 1894 Coleraine) Elizabeth.
1901-
www.census.nationalarchives.ie/pages/1901/Londonderry/Coleraine/Killowen_Street/15178751911-
www.census.nationalarchives.ie/pages/1911/Antrim/Ballycastle/Fairhill_Street/1127471. John Douthart (c1894 Coleraine-KIA 29 Mar.1918).
http://www.lennonwylie.co.uk/RobertThompsonBallycastle.htm2. Henry Douthart (c1897 Coleraine).
3. Andrew Douthart (July/Sept.1900 Coleraine).
4. Mary Douthart (c1904 Co.Antrim).
5. Samuel Douthart (c1908 Co.Antrim).
6. child (d.bef.1911).
Andrew Douthart (c1841?-Apr./June 1905) m. Hannah O’Brien (c1841-Apr./June 1912).
1. Mary Jane Douthart (c1862 Ballinteer). Bapt. 14 Feb.1862 2nd Dunboe.
2. Samuel Douthart (c1863 Ballinteer). Bapt. 1 June 1863 2nd Dunboe.
3. Ann Douthart (20 Aug.1867 Articlave dist.)
4. daughter (22 Aug.1874)
John Douthart (c1860) m.(1882) Mary Jane Dunlop? (c1863). 1901- Shotts, Lanark.
Marriage- John Dowthart.
1. Martha Jane Douthart (Jan./Mar.1884).
2. Mary Douthart (Oct./Dec.1885).
3. Joseph Douthart (1887).
4. John Douthart (1887).
5. Hannah Douthart (Apr./June 1890).
6. Andrew Douthart (1893).
7. William Douthart (1895).
8. Henry Douthart (1897).
(I have been unable to find all the birth registrations for this family in Irish records but suspect the problem is spelling of the surname)