Thackeray, an only child, was born in Calcutta, India, where his father, Richmond Thackeray (1 September 1781 – 13 September 1815), held the high rank of secretary to the board of revenue in the British East India Company. His mother, Anne Becher (1792–1864) was the second daughter of Harriet and John Harman Becher and was also a secretary (writer) for the East India Company.
William had been sent to England earlier, at the age of five, with a short stopover at St. Helena where the imprisoned Napoleon was pointed out to him. He was educated at schools in Southampton and Chiswick and then at Charterhouse School.
See also
http://en.wikipedia.org/wiki/William_...
