I am finding in my copies of the census records for Stewart (pre-Henry Co) and Henry County 1830-1840 that Kuykendall's are few. However, this is a good thing as they are likely related. Here is some of the following I find. Keep in mind that microfilm would need to be verified:

1820 Stewart Co. (pre-Henry Co) spelling obviously wrong
Kendendall, Jesse 10001031211

1830 Henry Co.
Kerkendall, Jacob 100101-1101001
Kerkendall, William 00001-0001
Kirkendall, Jesse 00010001-001

1840 Henry Co
Kuykendall, Robert 00002-0

Found this on Rootsweb World Connect. This does not immediately look pertinant but trust me, read on. Not entirely sure who posted this there or from what source it comes, but it could be helpful to you. Seems to be a biography:

Sanford Jeffries
by Peggy Smith Hake
Sanford Jeffries was born in Russell County, Kentucky on 16 September 1837. He had a twin brother, Hansford Jeffries, and they were the youngest of 14 children born to Toliver Jeffries and Mary (Warner). The known children of Toliver and Mary were: John Thomas Jeffries b. c/1812; Eliza Jeffries b. c/1817 m. Jesse Martin; James Madison Jeffries b. 1818; Derrick Jeffries b. c/1819 m. Nancy Jane Patterson; Samuel Jeffries b. c/1820; Toliver Jeffries Jr. b. c/1824; William W. Jeffries b. c/1826; Benjamin D. Jeffries b. c/1827; Sanford Jeffries and his twin brother, Hansford Jeffries b. 1837.
The Jeffries family left Russell County, Kentucky about 1854 and came to central Missouri. They settled in the Miller/Camden counties area and continued to live in the same region of Glaize township of Miller County where the Lake of the Ozarks State Park is now located.
In July 1855, Sanford married Elizabeth/Betsy Kuykendall, a daughter of Jacob Kuykendall. His twin brother, Hansford, married Susan Ann Kuykendall, a sister to Betsy. In 1866, Sanford, Betsy, Hansford and Susan Ann were named as heirs of Jacob Kuykendall in his probate records at the Miller County courthouse. They fell heir to 80 acres of land in the southwest corner of Glaize township, south of the Auglaize creek.
During the Civil War, Sanford served with the Union army in Company D of the Osage Battalion, under the leadership of Major J. W. McClennen. His older brother, Benjamin Jeffries, was Captain of Company D........Sanford served from 1861-1865.
Sanford and Elizabeth/Betsy (Kuykendall) were parents of seven children. Betsy died while still young and Sanford married his second wife, Mary Rinard. They became parents of three children. I have found the names of his ten children but do not know to which mother they belonged. The children were: Susan, Frank, Benjamin, Clate, Ada, Sadie (Blize), Dora (Huddleston), W. T., D. L., and E. H. These names appeared in Sanford’s obituary notice.
In 1889, Sanford married his third wife, Mary Frances Blankenship Huddleston, widow of George W. Huddleston. She was a daughter of David Blankenship and Mary Ballenger. Mary lived until 1925. Sanford Jeffries outlived three wives and five children. He died on March 23, 1935, almost reaching his 98th year. His funeral services were conducted by Rev. Charles Sooter at the New Hope Church near Kaiser. He was buried in the church’s cemetery located nearby.


Hope this has been helpful. Please understand that this is not a family line of mine, but I am a lookup volunteer.