Manikku Wadumestri Hendrick de Silva, QC (22 September 1886 - 6 March 1960) was a Ceylonese lawyer, judge and statesman.
As Deputy Solicitor General, de Silva led the prosecution of the famous Duff House murder case in 1934.
He was appointed Attorney General of Ceylon on 7 July 1942, succeeding John William Ronald Illangakoon, and held the office until 1946.
In 1949, he chaired the commission of inquiry to investigate allegations of bribery in the Colombo Municipal Council.
He introduced conciliation boards through the Conciliation Broads Act and attempted to regulate fees charged by proctors and advocates, but was met by stiff resistance from the legal practitioners which included threats of trade union action.