Anderson was the son of William Mather Anderson (Chief Inspector of the Oriental Bank in London and Acting Governor of Mauritius at one time) and Mary Anne Neilley (born and married in Australia and died in England).

[1] On 8 October 1908, Anderson married Ethel Campbell Louise Mason in Ahmednagar, India.

[1] Anderson is said to have received the French Légion d'honneur medal in the park at Cambrai in 1916.

However, the Musée de la Légion d'honneur says that Augustin Thomas Anderson, a colonel in the British Army, received the medal on 12 December 1918.

[1] Anderson died on 22 February 1949 in Turramurra, New South Wales, Australia.