 | Generation 1 - Joan Mary O'Brien: Born - 25 Oct 1917 - Biggleswade, Bedfordshire, England |  |
 | Generation 1 - Joan Mary O'Brien: Died - 28 Oct 2007 - Pinner, Middlesex, England | |
 | Generation 2 - William Joseph O'Brien: Born - 8 Feb 1889 - Limerick, Ireland | |
 | Generation 2 - William Joseph O'Brien: Died - 13 Jul 1971 - Derby, Derbyshire, England | |
 | Generation 2 - William Joseph O'Brien & Kate Harriet Grist: Married - 8 Feb 1917 - Hitchin, Hertfordshire, England | |
| Generation 2 - Kate Harriet Grist: Died - 4 Jan 1953 - Derby, Derbyshire, England | |
| Generation 3 - Edward O'Brien: Died - 31 Jul 1891 - Limerick, Ireland | |
| Generation 3 - Sarah Gleeson: Died - 25 Aug 1941 - Limerick, Ireland | |
 | Generation 3 - Peter Grist: Born - 5 Oct 1853 - Boston, Lincolnshire, England | |
 | Generation 3 - Caroline Antoinette Heeger: Born - 1858 - Good Hope, Eastern Cape, South Africa | |
| Generation 4 - James Edward Grist: Born - 1807 - Boston, Lincolnshire, England | |
| Generation 4 - James Edward Grist & Mary Ann Webster: Married - 10 Jun 1841 - Boston, Lincolnshire, England | |
 | Generation 4 - Mary Ann Webster: Born - Oct 1819 - Louth, Lincolnshire, England | |
 | Generation 4 - Philip Francis John Heeger: Died - Abt 1895 - Cape Town, Western Cape, South Africa | |
 | Generation 5 - Benjamin Grist: Born - Oct 1785 - Cranwell, Lincolnshire, England | |
 | Generation 5 - William Webster: Born - Abt 1795 - Lincolnshire, England | |
| Generation 5 - Mary Croft: Born - 1796 - Lincolnshire, England | |
1917 - 2007 (90 years)
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