Christopher DE Silva Ceylon 1800 1900s

I am Looking for my great great grandfather Christopher de Silva born early 1800s. He was a Doctor of Medicine. He married Mary Margaret,I do not know her surname. As far as I know they had two boys and one girl. The boys were: Richard Thomas de Silva, born 9 December 1846 in Ceylon, died 9 August 1926 in New Zealand and Andrayas de Silva, born 8 April 1843, died 20 November 1898 in Ceylon. I do not know much about their sister.
So if anyone has information on Christopher and his family, please contact me, Jocelyn Le Noel (de Silva) on flight3@xtra.co.nz
Thank you