I have a photocopy of an article that might be of help to someone. It is not my Sizemore line but maybe it would interest someone else.
FAMILY HISTORY OF OLD SETTLERS OF LESLIE COUNTY FROM OUR FILES.
The family history of the Sizemore family, among the first settlers of Leslie county, is taken from our files of February 1938. It was written for The Thousand Sticks by one of Leslie's leading citizens, Judge L.D. Lewis, deceased.
A short sketch of the early settlers of the Sizemore family in what is now Leslie County, at the time of this early settlement it was Knox county. John Sizemore was the first man that ever had a residence at the mouth of Rockhouse Creek of the Middle Fork of the Kentucky River where the town of Hyden now stands. He came here from North Carolina about 1817; his wife was Nancy Bowling. He had a sister who married William Begley and they settled six miles below Hyden at the south of Cutshin. His brother-in-law, John Bowling, settled about two miles up the Middle Fork above Hyden. His brother-in-law, Preacher John Gilbert settled on Red Bird, 15 miles from Hyden at the mouth of Gilbert's Creek.
John Sizemore had the following sons: Bill, Henry, Jim, Carr and John and the following daughters, Mahala, wife of Eli Couch; Rebecca, wife of James Napier; Kissie, wife of Hughes Napier; Sarah, wife of Bob Asher; and Susie, wife of Harmon Sizemore.
John Sizemore died before the Civil War, about 1850, and was buried in Hyden near the Presbyterian Church. His wife survived him several years. She died about the year 1870 and was buried two miles southwest of Hyden at the home of her son William Sizemore on Rockhouse Creek.
John Sizemore was related to George Goolden Sizemore, perhaps a brother. George Goolden lived and died somewhere in or near the Floyd county line. Goolden is the ancestor of the Hayses in Knott county, the Arnetts in Magoffin county and the Wermans in Wolfe county.
William Sizemore, son of John and Nancy Sizemore, married Mornin Bowling. After his marriage he lived at the mouth of White Oak on South Fork in Owaley county a short time. His oldest son, Luther, was born there. Bill then moved to Rockhouse Creek where he raised his family and died about the year 1835(sic). Bill's sons were the following: Luther, Bige, Joe; his daughters were Sophia, wife of Sam Sizemore; Kissie, wife of Irvine Howard; Emily, wife of Hiram Begley; and Ellen, wife of Ballard Begley.
Luther Sizemore was a Federal soldier and in 1890 he was elected Jailer of Leslie county.
All these people had large famillies. Henry Sizemore, brother of Bill, settled on Elisha's Creek and had a large family. His children were Blev, John, Bob and others.
John and Nancy Sizemore married (probably a line of type out here.HPS) Cynthia Sizemore and settled on Rockhouse Creek. He and his wife died about the year 1872. They had a large family. Two of the children were Willis, a Baptist preacher, and Martha.
John Sizemore, another son of John and Nancy Sizemore, married Jane Treadway and first settled on Rockhouse Creek but afterward moved to Clay county and settled at the mouth of Gilberts's Creek where he died. John was elected assessor of Clay county, was perhaps elected two times and was known as "Assessor" John. His children were Duke, George and Sid and his girls were Nancy, who married Col. John Lucas, Sally, wife of Henry Revis and Mary, the wife of Hamblin Napier.
Mahala, the daughter of John and Nancy Sizemore, married Eli Couch. They settled in the vicinity of Hyden and Dill Branch of Rockhouse and they had the following children: John Couch (Esq.), Carr and Bill. Their daughters were Susan, wife of John Davidson, Sally, wife of Jack Sizemore, Peggy, wife of Dan Lewis, and Lucinda, wife of Luther Bowling, who lived near the Lucinda Knob.
Another daughter of John and Nancy Sizemore was Rebecca who married James Napier. They settled on Muncey's Creek and had the following children: Bill, Ham, and Felix and the daughters were Nancy, wife of John Slusher, another daughter married Hence Mosley; they also had other children.
Another daughter of John and Nancy Sizemore, Kissie, married Hughes Napier and had the following sons: Jim, Bige, Bill and Lincoln; their daughters were (part of copy is off the page)wife of Joe Woods. Rebecca married Dan Nantz, another daughter married John Wooton, Mollie married Tom Morgan, Luther went to Arkansas.
Another daughter of John and Nancy Sizemore married Harmon Sizemore. Their family was born in Leslie county. He had one son who married a Whitehead girl and died here, another son Jim who lived on Jack's Creek. Harmon had a daughter who married G. Mosley, who lived in this county. Harmon and his wife moved to Asher in 1870, they also had other children.
John and Nancy Sizemore had another daughter who married Bob Asher and then raised a family on Red Bird. We only know of two children, Dill and Willis, but they had other children. Their son Bill married a Sizemore and Dill's children were: Bob, Eugene, Sid and Mrs. Roark. Dill was a Federal soldier and was at the siege of Vicksburg.
End of Lewis article.