William Hewson (14 November 1739 – 1 May 1774) was a British surgeon, anatomist and physiologist who has been referred to as the "father of haematology".

[1] Born in Hexham, Northumberland, Hewson initially studied in 1753 at the Newcastle Infirmary, Newcastle upon Tyne (which later became the Royal Victoria Infirmary) under its founder Richard Lambert and much later in the winter of 1761/1762 in Edinburgh and was a student, and later an assistant, of William Hunter.

[3][4] His major contribution was in isolating fibrin, a key protein in the blood coagulation process.

Paul Knapman, the Westminster Coroner, said yesterday: "I cannot totally discount the possibility of a crime.

I give to her son, William Hewson, who is my godson, my new quarto Bible, and also the botanic description of the plants in the Emperor's garden at Vienna, in folio, with coloured cuts.And to her son, Thomas Hewson, I give a set of "Spectators, Tattlers, and Guardians" handsomely bound.