Thomas Hassall was born 29 May 1794 in Coventry, Warwickshire, England, United Kingdom to Rowland Hassall (1768-1820) and Elizabeth Hancox (1766-1834) and died 29 March 1868 Denbigh Cobbitty, New South Wales, Australia of unspecified causes. He married Ann Marsden (1794-1885) 12 August 1822 St Johns in Parramatta, New South Wales, Australia.
Children
| Name | Birth | Death | Joined with |
| James Samuel Hassall (1823-1904) | |||
| Catherine Elizabeth Hassall (1825-1922) | |||
| Mary Anne Hassall (1827-1911) | |||
| George Thomas Hassall (1828-1910) | |||
| Harriet Jane Hassall (1830-1910) | 12 December 1830 Cobbitty, New South Wales, Australia | 31 August 1910 Ashfield, New South Wales, Australia | John Norton Oxley (1824-1891) |
| Charles Rowland Hassall (1832-1919) | |||
| Eliza Marsden Hassall (1834-1917) | |||
| Emily Hassall (1836-1837) | |||
Footnotes (including sources)
| ‡ General |
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