James William Macarthur-Onslow was born 7 November 1867 Camden Park in Menangle, New South Wales, Australia to Arthur Alexander Walton Onslow (1833-1882) and Elizabeth Macarthur (1840-1911) and died 17 January 1946 Camden Park Menangle, New South Wales, Australia of unspecified causes. He married Enid Emma Macarthur (1868-1952) 15 December 1897 in Darlinghurst, New South Wales, Australia.
Children
| Offspring of James William Macarthur-Onslow and Enid Emma Macarthur (1868-1952) | |||
| Name | Birth | Death | Joined with |
| Arthur James Macarthur-Onslow (1898-1959) | |||
| Helen Maude Macarthur-Onslow (1899-1967) | |||
| Elizabeth Enid Macarthur-Onslow (1903-1989) | |||
Footnotes (including sources)
| ‡ General |
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| Ω Birth |
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| ₪ Wedding |
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