Henry Sylvester Williams (24 Machi 1867– 26 Machi 1911) alikuwa mwanasheria, diwani na mwandishi nchini Trinidad na Tobago. Alihusika katika kuhamasisha Muungano wa Afrika. Alizaliwa Arouca, Trinidad na alikwenda nchini Marekani kujifunza ualimu. Imanuel Geiss, The Pan-African Movement: A History of Pan-Africanism in America, Europe and Africa, London: Methuen, 1974. James R. Hooker, Henry Sylvester Williams: Imperial Pan-Africanist, London: Rex Collings, 1975, 135 pp. Owen C. Mathurin, Henry Sylvester Williams and the Origins of the Pan-African Movement, 1869–1911 (Contributions in Afro-American & African Studies), Greenwood Press, 1976, 224 pp. Marika Sherwood, Origins of Pan-Africanism: Henry Sylvester Williams, Africa, and the African Diaspora, London: Routledge, ISBN 978-0-415-87959-0, 354 pp. Eichhorn N. (2019) "Henry Sylvester Williams’s Black Atlantic." In Atlantic History in the Nineteenth Century. Palgrave Macmillan