Theodorus Nicholas Gill (Anglice: Theodor Gill) natus est die 21 Martii 1837, in Novum Eboracum - mortuus est die 25 Septembris 1914 in Novum Eboracum fuit studiosus zoologiae Americanus.

• 1871, Arrangements of the Families of Mollusca.
• 1872, Arrangement of the Families of Mammalia.
• 1872, Arrangement of the Families of Pisces.
• 1875, Catalogia Pisces of the East Coast of North America.
• 1882, Bibliography of the Pisces of the Pacific of the United States.
• 1879, Reports on Zoology" for the annual volumes of the Smithsonian Institution.

• Abbott, R.T., and M.E. Young (eds.). 1973. American Malacologists: A national register of professional and amateur malacologists and private shell collectors and biographies of early American mollusk workers born between 1618 and 1900. American Malacologists, Falls Church, Virginia. Consolidated/Drake Press, Philadelphia. 494 pp.
• Obituary in The Auk, October 1914, Number 4.
• Appleton's Cyclopedia of American Biography, edited by James Grant Wilson, John Fiske and Stanley L. Klos. Six volumes, New York: D. Appleton and Company, 1887-1889

• Smithsonian biography of Theodore Gill
• A pdf biography of T. Gill

Haec stipula ad biographiam spectat. Amplifica, si potes!