- O'Neill
-
John 2529 b. 1835John 4335 b. 1830Michael 4329 b. 1833Stephen 2591 b. 1830Terence 4391 b. 1832
- O'Pra
-
Daniel 5425 b. 1838
- O'Rourke
-
Patrick 5153 b. 1828, d. 21 May 1888Thomas 8097 b. 1836
- O'Sullivan
-
William Alfred 224 b. 1826, d. 16 Jul 1890
- O'Wilkes
-
John 1614 b. 1820
- Oakden
-
Thomas 5415 b. 1830, d. 10 Aug 1861
- Oakes
-
John 8161 b. 1838
- Oakley
-
Israel 6689 b. 1838William 6687 b. 1831
- Oates
-
John 683 b. 1809, d. 2 May 1887Stephen 4015 b. 1824, d. 6 Apr 1871Thomas 5034 b. 1809, d. 17 Oct 1862William 5047 b. 1830, d. 11 Jul 1893
- Oats
-
John 683 b. 1809, d. 2 May 1887William 5047 b. 1830, d. 11 Jul 1893
- Obro
-
Henry 5106 b. 1839
- Offer
-
Henry 746 b. 1829, d. 25 Aug 1913
- Ogborn
-
Henry 2706 b. 1828, d. 8 Mar 1902
- Ogborne
-
James Henry 2706 b. 1828, d. 8 Mar 1902
- Ogilvie
-
William Lindsay 1010 b. 1831
- Ogle
-
Hans 822 b. 1819, d. 11 Nov 1874John 784 b. 1828, d. 1861Robert 783 b. 1831, d. 21 Sep 1884
- Oldfield
-
John 1205 b. 1824, d. 8 Nov 1900
- Oldham
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Henry 7667 b. 1832, d. 1887John Charles 7506 b. 1834, d. 9 Jul 1887Joshua 7811 b. 1834, d. 14 Jan 1865William 6690 b. 1835, d. 15 Apr 1891