Catherine Maria Guillon was born on 4 January 1830 in Bellary, Madras, India as possibly the first child of Alexander or Archibald Guillon. She was baptized on 12 February 1830. It would appear that when she was just 14 (probably not uncommon in India at that time), she married Richard Seddon, son of Giles Seddon, on 9 October 1844 in Bellary, Madras, India.
Richard Seddon and Catherine Maria Guillon had the following known children:
- Richard John Seddon was born on 09 Nov 1851 in Madras, India. He died in 1890.
- Giles Seddon was born on 12 May 1856 in Madras, India.
- Alexander Seddon was born on 26 Sep 1857 in Secunderabad, Andhra Pradesh, India.
- Agnas Ellen Seddon was born on 26 Dec 1860 in Secunderabad, Andhra Pradesh, India. She died on 18 Jul 1862 in Secunderabad, Andhra Pradesh, India.
- Ruth Seddon was born on 13 Aug 1862 in Secunderabad, Andhra Pradesh, India. She died on 15 Jun 1864 in Madras, India.
- Allan Jehoshaphat Seddon was born on 20 Sep 1864 in Madras, India.
- Samuel Arthur Seddon was born on 30 Jan 1868 in Mooltan, West Bengal, India. He died on 01 Jul 1939 in Bareilly, Uttar Pradesh, India. He married Sybil Rosamund Pitts on 23 Sep 1891.
- Judith Seddon was born on 16 Sep 1869 in Bangalore, Karnataka, India.
- Lucy Seddon was born on 17 Jan 1871 in Bangalore, Karnataka, India. She died in 1871 in Bangalore, Karnataka, India.
- Esther Seddon was born on 20 May 1874 in Bangalore, Karnataka, India.
This is a work in progress and much of the information needs to be checked and double checked.