Family: Robert Irwin / Sarah Matilda Lithgow (F17)
m. 6 Mar 1876William Irwin (1827-1865) 
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Mary Ann Wilson (1837-1899)
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Elizabeth Jane - Eliza Jane - Irwin (1857-1930)  |
| Mary Anne Irwin (1861-1943) |
| William Irwin (1862- ) |
| John Irwin Butson (1866-1885) |
| Robert Irwin (1856-1925)
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| Sarah Matilda Lithgow (1858-1899) |
| Victoria Regina Letitia Irwin (1877-1929) |
| George Percy Irwin (1879-1880) |
| Robert Lithgow Irwin (1882-1943) |
| Wilburt Watson Albert Irwin (1883-1968) |
| May Irwin (1886- ) |
| Mary Virginia Irwin (1888-1969) |