Her branch of the family spelled the surname differently from his. See A.S. Salley, The Calhoun Family of South Carolina, Columbia, SC: 1906. p. 19. The name appears in various records as "Colhoon", "Cohoon", "Calhoun", "Cahoun", "Cohoun", "Calhoon", and "Colhoun". Ibid., pp. 1–2, 5–6, 18–19. In Scotland, it is spelled "Colquhoun". EllenR. Johnson, Colquhoun/Calhoun and Their Ancestral Homelands (Heritage Books, 1993), passim.
Congress, United States (March 11, 1940). "Extension of Remarks of John H. Bankhead, 2nd". Proceedings and Debates of the 76th Congress, Third Session, V. 46, Part 14, Appendix. Congressional Record. p. 1318. Retrieved September 22, 2019.
Ford 1988, pp. 405–424. Ford, Lacy K. Jr (1988). "Republican Ideology in a Slave Society: The Political Economy of John C. Calhoun". Journal of Southern History. 54 (3): 405–424. doi:10.2307/2208996. JSTOR2208996.
Ford 1994, pp. 19–58. Ford, Lacy K. Jr (1994). "Inventing the Concurrent Majority: Madison, Calhoun, and the Problem of Majoritarianism in American Political Thought". Journal of Southern History. 60 (1): 19–58. doi:10.2307/2210719. JSTOR2210719.
Kateb 1969, pp. 583–605. Kateb, George (1969). "The Majority Principle: Calhoun and His Antecedents". Political Science Quarterly. 84 (4): 583–605. doi:10.2307/2147126. JSTOR2147126.
Russell 1966, pp. 466–486. Russell, Robert R. (1966). "Constitutional Doctrines with Regard to Slavery in Territories". Journal of Southern History. 32 (4): 466–486. doi:10.2307/2204926. JSTOR2204926.
Belko 2004, pp. 170–197. Belko, William S. (2004). "John C. Calhoun and the Creation of the Bureau of Indian Affairs: An Essay on Political Rivalry, Ideology, and Policymaking in the Early Republic". South Carolina Historical Magazine. 105 (3): 170–197. JSTOR27570693.
Ford 1988, pp. 405–424. Ford, Lacy K. Jr (1988). "Republican Ideology in a Slave Society: The Political Economy of John C. Calhoun". Journal of Southern History. 54 (3): 405–424. doi:10.2307/2208996. JSTOR2208996.
Ford 1994, pp. 19–58. Ford, Lacy K. Jr (1994). "Inventing the Concurrent Majority: Madison, Calhoun, and the Problem of Majoritarianism in American Political Thought". Journal of Southern History. 60 (1): 19–58. doi:10.2307/2210719. JSTOR2210719.
Kateb 1969, pp. 583–605. Kateb, George (1969). "The Majority Principle: Calhoun and His Antecedents". Political Science Quarterly. 84 (4): 583–605. doi:10.2307/2147126. JSTOR2147126.
Russell 1966, pp. 466–486. Russell, Robert R. (1966). "Constitutional Doctrines with Regard to Slavery in Territories". Journal of Southern History. 32 (4): 466–486. doi:10.2307/2204926. JSTOR2204926.