1. See also

Thomas Duncan may refer to:

• Thomas Duncan (general) (1819–1887), United States Army general during the Civil War
• Thomas Duncan (Canadian politician) (d. 1910), politician in Manitoba, Canada
• Thomas Duncan (painter) (1807–1845), Scottish portraitist and historical painter
• Thomas Duncan (Wisconsin legislator) (1893–1959), Milwaukee Socialist senator and representative
• Thomas Young Duncan (1836–1914), New Zealand Liberal Party politician
• Thomas William Duncan (1905–1987), US writer
• Thomas Eric Duncan (d. 2014), first person to die of Ebola in the United States
• Tommy Duncan (1911–1967), American musician
• Tommy Duncan (footballer) (born 1936), Scottish footballer and manager

See also

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• Substantial truth doctrine
• Substantia niagra
• Substantia propria
• Substantive adjective
• Substantive dye
• Substantive Representation
• Substantive representation
• Substantive resolution
• Substantive resolutions
• Substantive rights
• Substantivism
• Substar
• Substars
• Substation Alpha
• SubStation Alpha
• Sub Station Alpha
• Substation Configuration Language
• Substellar
• Substellar object
• Substellar objects
• Substernal thyroidectomy
• Substinence wage
• Substitute (character)
• Substitute character
• Substitute checks in the United States