Elizabeth Macarthur was born 8 May 1840 Camden Park in Menangle, New South Wales, Australia to James Macarthur (1798-1867) and Emily Stone (1806-1880) and died 2 August 1911 London, England, United Kingdom of unspecified causes. She married Arthur Alexander Walton Onslow (1833-1882) 31 January 1867 .
Children
| Name | Birth | Death | Joined with |
| James William Macarthur-Onslow (1867-1946) | 7 November 1867 Menangle, New South Wales, Australia | 17 January 1946 Menangle, New South Wales, Australia | Enid Emma Macarthur (1868-1952) |
| Emily Susan Macarthur-Onslow (c1869-c1876) | |||
| Rosa Sibella Macarthur-Onslow (c1871-1943) | |||
| Arthur John Macarthur-Onslow (1873-1953) | 1873 Menangle, New South Wales, Australia | 20 April 1953 Terrigal, New South Wales, Australia | Christian Leslie Bell (?-1946) |
| George Macleay Macarthur-Onslow (1875-1931) | 2 May 1875 Menangle, New South Wales, Australia | 12 September 1931 Camden, New South Wales, Australia | Violet Marguerite Gordon (1879-1981) |
| Arthur William Onslow (1877-1914) | |||
| Francis Arthur Macarthur-Onslow (1879-1938) | |||
| Alexander N Onslow (c1882-c1883) | |||
Footnotes (including sources)
| ‡ General |
|
| ₪ Wedding |
|