Nathaniel Grigsby, may have been the name of the child of Aaron Grigsby and Sarah Lincoln stillborn on January 20, 1828 in Spencer, Indiana. The infant was the only child of his mother, Sarah Lincoln Grigsby, sister of Abraham Lincoln. Sarah died the same day, in childbirth. 
The following Ancestry citations suggest his parents married in Indiana. They do not, however, prove the child was named Nathaniel.
↑ Find A Grave, database and images (accessed 05 November 2019), memorial page for Infant Grigsby (20 Jan 1828–20 Jan 1828), Find A Grave: Memorial #8765209, citing Pigeon Creek Baptist Church Cemetery, Dale, Spencer County, Indiana, USA ; Maintained by M & K Fine (contributor 46603732) .
↑ Yates Publishing, U.S. and International Marriage Records, 1560-1900, online publication - Provo, UT, USA: The Generations Network, Inc., 2004.
↑ Ancestry.com, Indiana Marriage Collection, 1800-1941, online publication - Provo, UT, USA: The Generations Network, Inc., 2005. Original data - Works Progress Administration, comp. Index to Marriage Records Indiana: Indiana Works Progress Administration, 1938-1940. Jordan Dodd, Liahona Research, comp.
This person was created through the import of Beaman Family Tree.ged on 31 March 2011.