Sir Shridath Surendranath Ramphal GCMG AC ONZ OE OCC NIIV OM KC FRSA (3 October 1928 – 30 August 2024), often known as Sir Sonny Ramphal, was a Guyanese politician who was the second Commonwealth Secretary-General, holding the position from 1975 to 1990.

He was also the foreign minister of Guyana from 1972 to 1975, and assistant attorney general of the West Indies Federation from 1958 to 1962.

[3] After attending schools in Georgetown, Ramphal studied law at King's College London, graduating with LL.B.

[7] During Ramphal's time as Commonwealth Secretary-General, the United Kingdom represented by Margaret Thatcher was found to be in a minority of one on the issue of economic sanctions against apartheid South Africa.

[10][11] He was appointed Knight Grand Cross of the Order of St Michael and St. George (GCMG) in 1990.

Ramphal is portrayed by Tony Jayawardena in the fourth season of the Netflix web television series The Crown.