| Birth |
25 Sep 1808 |
At Sea off Isle of Wight, England |
| Died |
16 Mar 1882 |
Cape Town, Western Cape, South Africa |
| |
| Father |
John Mears Devenish, b. 4 Sep 1787, FitzShawbet St, Dublin, Ireland |
| Mother |
Ellen St Ledger Stretch, b. 9 Apr 1787, Co. Cork, Ireland |
| |
| Family 1 |
Anna Eleonora de Beer, b. 30 Oct 1810 |
| Married |
2 Apr 1833 |
Beaufort West, Western Cape, South Africa |
| Children |
| + | 1. Anna Leonora Devenish, b. 6 Mar 1836 |
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| Family 2 |
Elizabeth Francina Keuler, b. 1818 |
| Married |
13 May 1837 |
Beaufort West, Western Cape, South Africa |
| Children |
| | 1. James St Leger Devenish, b. 25 Aug 1838 |
| + | 2. Elizabeth Ellen Augusta Devenish, b. 15 Nov 1839 |
| | 3. Ellen Charlotte Devenish, b. 1 Dec 1840 |
| | 4. Georgina Catharina Devenish, b. 1 May 1842 |
| + | 5. John Mears Devenish, b. 22 Apr 1844 |
| | 6. Ferdinand Augustus Devenish, b. 20 Apr 1846 |
| | 7. Fanny Jemima Devenish, b. 7 May 1848 |
| | 8. Charles Lennox Devenish, b. 25 Jun 1850 |
| | 9. George Devenish, b. 3 May 1854, Beaufort West, Western Cape, South Africa |
| | 10. Maria Marcella de la Marc Devenish, b. 25 Mar 1855 |
| + | 11. James John Devenish, b. 31 Jul 1856 |
| | 12. David Grey Devenish, b. 24 Aug 1858 |
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