Robert married Jennett "Janet" Ann Sampson on 30 Jul 1879 in Adelaide, , South Australia, Australia. Jennett (daughter of William Sampson and Elizabeth McDonald) was born on 2 Jul 1860 in Kooringa, , South Australia, Australia; died on 12 May 1945 in Boulder, , Western Australia, Australia. [Group Sheet] [Family Chart]

1. William Castle Horrocks Hopkins was born on 11 Sep 1880; died on 9 May 1945 in Cottesloe, , Western Australia, Australia.
2. Olive Blanche Hopkins was born on 9 Jan 1883 in Hilton, , South Australia, Australia; died on 14 Jul 1947 in Western Australia, Australia.
3. Cecil George Hopkins was born on 26 Feb 1884; died on 29 Dec 1884.
4. Robert Branwell "Bram" Hopkins was born on 6 Oct 1887 in Burra, , South Australia, Australia; died on 10 Aug 1963 in Nollamara, Western Australia.
5. Francis Thomas Barrier Hopkins was born on 21 Mar 1889 in Broken Hill, , New South Wales, Australia; died on 16 Apr 1942 in North Perth, West Australia, Australia.
6. Lena I Hopkins was born in 1894 in New South Wales; and died.