- William Watson (1559-1603), priest English of the 17th century, carried out for conspiracy
- William Watson (1715-1787), scientific British of the 18th century known for its work in Botanical and its experiments on the electricity;
- William T. Watson (1849-1917), banker and American politician, governor of the Delaware of 1895 to 1897;
- William Watson (1896-1967), Canadian realizer;
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