Generation 1
1: Thomas Grayson1 born 1794; married Jane Hamilton ; died 18 Jun 1879.
Children of Thomas Grayson and Jane Hamilton
- William born 1807.
- Elizabeth baptised 20 Jul 1811 at Shankill Parish, N. Ireland; died 1891 at Fairfield, Qld.; married John Ruddy c. 1837.
- Anne born 1814.
- Rebecca born 1816.
- Francis born 1823; died 1903 at Shankill parish, Lurgan; married Margaret Murphy 1844.
- James born 1826; married Priscilla Malcolmson.
- Thomas born 1831; died 1902; married Hannah Nesbitt 1852.
- David born 1833; married Elizabeth McKee 1859.
Generation 2
2: James Grayson2 (Thomas1) born 1826; married Priscilla Malcolmson 23 Jun 1848 at Seagoe Parish, N.I..
Children of James Grayson and Priscilla Malcolmson
- Thomas born 1852 at Boconnel, Armagh, N.Ireland; married Elizabeth Mawhirt.
Generation 3
3: Thomas Grayson3 (James2) (Thomas1) born 1852 at Boconnel, Armagh, N.Ireland; married Elizabeth Mawhirt 14 May 1873 at Seagoe parish, N.Ireland; died 13 Oct 1931 at Killarney, Qld. Immigrated: 20 Sep 1873 to Moreton Bay aboard "Great Queensland ". .
Children of Thomas Grayson and Elizabeth Mawhirt
- Mary Ann born 22 Apr 1874 at Killarney, Qld; died 13 Sep 1974 at Brisbane; married Samuel David Gallagher 09 Aug 1904.
Mary worked as a domestic on properties at Warwick and Charleville before she met and married Sam Gallagher. The
couple lived in Chermside for two years before shifting to Coorparoo.
- Priscilla Jane born 16 Sep 1875; died 08 May 1972; married Charles Mutch 05 Feb 1902.
- James born 06 Mar 1877 at Merivale, Tannymorel; died 27 Jan 1968 at Warwick; married Hannah Mary Ann Hone Fletcher 30 Oct 1906.
- Margaret Jane born 07 Mar 1879; died 12 Apr 1946 at Old Koreelah, NSW; married Sidney Swettenham Fletcher 17 Oct 1903.
- Thomas George John born 08 Feb 1881; died 10 Mar 1945; married Alice Annie Hall 16 Jan 1907.
- Allan born 02 Dec 1882; died 20 Jan 1963 at Brisbane; married Stella Cordelia Harris Biggs 08 Mar 1911.
- William Mawhirt born 24 Jun 1884; died 27 Sep 1957; married Lillian Elizabeth Gibbs 17 Jan 1906.
- Elizabeth born 23 Dec 1885; died 11 Aug 1972; married George Ellis 11 May 1904.
- Edith born 03 Jun 1887; died 31 Jul 1962; married John Hall Mogridge 26 Feb 1908.
- Alexander Malcolm born 12 Dec 1888; died 24 Jul 1972; married Margaret Kerr 24 Apr 1920.
- Rachael Eliza born 23 Aug 1890; died 01 Jul 1941; married William Henry Groves 13 Feb 1912.
- Florence born 24 Jun 1894; died 20 Jun 1981.
- Norman George born 12 Sep 1895; died 08 Jun 1983 at Benowa; married Barbara Maud Kerr 27 Nov 1918; married 2: Esme Carey 08 Mar 1952.