He was a native of Woodson [sic] County, Kentucky, emigrated west at a very early day. Upon his arrival in Missouri, he entered land in the then new county of Clay, which had just been organized. He continued his residence in Clay for a period of thirty years, finally coming to Worth County in 1855, and settling in Greene Township. Mr. Willhite was one of the representative farmers of Worth County and dealt extensively in cattle and hogs. He died in May 1874  at the age of sixty-seven years. His sons, Merrit, Lewis, Robert, John, and Simeon are now living in Worth County, and Nathaniel lives in Platte County, Missouri. His widow still survives him.
September 28, 1826 - Married Nancy Florea in Woodford County, Kentucky.
1827 - Moved to Clay County, Missouri from Woodford County, Kentucky
1848 - Purchased a sixteen year old slave girl named Sally from Thomas Jacks.Vance Hauber of Worth county had a bill of sale handed down through his family made out to Simeon Willhite, a great-grandfather, for proof of ownership of a slave girl (Sally), then 16-years old. Hauber said he remembers his ancestors telling him that after the slaves were freed, this particular one stayed with the Willhite family of her own choosing, remaining with the family until she died. Sally married Perry and had two children (girls) Rhoda and ? Great grandmother Willhite (Nancy) performed the wedding ceremony - probably at the Willhite home. They jumped the broomstick - that was the usual ceremony. Sally kept Aunt Kate while Grandma (Eliza) went to town. Fed her, for her baby was about the same age. Grandma (Eliza) went to Sally's for dinner. She spread a tea towel under her plate - not a table cloth...They lived in cabins south and a little east of Buster Dannare house (1956). Grandma (Eliza) knit Perry some mittens. He took the first one done - nearly wore it out before the second one was done. Sally is buried in the cemetery on Uncle Merrit's land west of Bud Milligans place.
1854 - Simeon acquires 320 acres in three separate land entries. The original Land entries include: 80 acres, northwest quarter section 3 - Township 65, Range 2 in Gentry County. (In 1855, his son Lewis J Willhite, has an original land entry for 40 acres in the same township in the southwest quarter of section 3.). Simeon also has a land entry for 80 acres in Township 66, Range 32 on the southwest quarter section 15The final section is 80 acres of land in Township 66, Range 32, on the southwest quarter section 34
1856 - Moved to Greene Twp., Gentry County (now Worth County), Missouri locating on a farm.
The Germanna Record, No. 13 - The Blankenbaker, Weaver, and Wilhoit Families, The Memorial Foundation of the Germanna Colonies, Inc., Publishers, 2006
John Willhoite (1745-1837) and His Descendants in Kentucky and Elsewhere Author: Earl and Leona Willhoite
Wilhite/Wilhoit & Allied Descendants of Johann Michael and Anna Maria (Hengsteler) Wilheit 1671-1994 Compiled by Mary F. Mickey
"United States Census, 1820," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XHLH-XZB : accessed 14 December 2014), Simeon Wilhoite, Not Stated, Jefferson, Kentucky; citing p. 58, NARA microfilm publication M33, (Washington D.C.: National Archives and Records Administration, n.d.), roll 24; FHL microfilm 186,184.
"United States Census, 1830," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XHPZ-K7F : accessed 14 December 2014), Simeon Wilhoit, Not Stated, Clay, Missouri; citing p. 291, NARA microfilm publication M19, (Washington D.C.: National Archives and Records Administration, n.d.), roll 73; FHL microfilm 14,854.
"United States Census, 1840," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XHTF-7RG : accessed 14 December 2014), Simeon Willhoite, Not Stated, Clay, Missouri; citing p. 6, NARA microfilm publication M704, (Washington D.C.: National Archives and Records Administration, n.d.), roll 222; FHL microfilm 14,855.
"United States Census, 1850," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MDZW-XZ1 : accessed 4 January 2015), Simson Willhoit, Liberty, Clay, Missouri, United States; citing family 265, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
"United States Census, 1870," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M4FH-81Q : accessed 14 December 2014), Simon Wilhite, Missouri, United States; citing p. 8, family 55, NARA microfilm publication M593, National Archives and Records Administration, Washington D.C.; FHL microfilm 552,325.]
"Kentucky Marriages, 1785-1979," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FW55-LBS : accessed 14 December 2014), Simeon Wilhite and Nancy Florea, 28 Sep 1826; citing Woodford County, Kentucky, reference ; FHL microfilm 252,320.
The History of Gentry and Worth Counties, Missouri: Containing a History of these counties, their cities, towns, etc. etc. page 839 St. Joseph Mo.; National Historical Company 1882 
A History of Northwest Missouri by Walter Williams, Vol. 1, Publ 1915. Transcribed by Melody Beery 
Simeon Willhite Genealogy, U.S. Wright, August 11, 1946, Recipient: Don Blagg
It may be possible to confirm family relationships with Simeon by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: