I have the following information:
1860 Harlan County Census
John H. Creech, 29, KY(H. = Harrison, sometimes called Harry)
Mary Ann Creech, 24, KY(Smith)
Martin Creech, 4, KY
1880 Harlan County Census
John H. Creech, 50, Head, KY KY KY
Mary A. Creech, 44, Wife, KY KY KY
Sarah Creech, 10, Dau, KY KY KY
Elizabeth Creech, 4, Dau, KY KY KY
Marton Creech, 24, Head, KY KY KY
Elizabeth, 21, wife, KY KY KY
Mary Creech, 4 Dau, KY KY KY
Joseph Creech, 2, son, KY KY KY
Marriage Index Harlan County Kentucky
Martin Creech md. Patience E. Wynn 1875, book 4, page 19
1900 Harlan County Census
John H. Creech, Head, Mar. '25, age-25, married 44 y. KY KY KY
Mary Ann Creech, wife, Jul '34, age-65, 4/3(gave birth to 4 children with 3 still living at the time)
Sarah Ann Creech, dau, Oct '73, age-26, wd, 2/2
Nancy Blanton, granddau, April '91, age-9
Bradley Creech, grandson, Feb '94, age-6
James Elbert , grandson, Nov '97, age-2 (This is James Elbert Witt, son of Elbert Witt and Elisabeth Creech living next door
Elbert Witt, Head, Oct '78, age-21 md 3y
Elisabeth (Creech) Witt, wife, Jul '76 age-24 2/2
Delbert H. Witt, son, Sep '98 age-1
Harlan County Marriage Records
1888 Sarah A. Creech md. Henry Blanton, book 6, page 520
1897 Elizabeth Creech md. Elbert Witt, book 9, page 154
Some of the later marriages may have listed the parents.This may be something you could check.
Also, later deaths after 1913 or around that time may have the death certificates that list their parents.
According to the 1850 Harlan County census by Durham, Mary Ann Smith is the d/o David Smith and Sally (Sarah) Bailey.
John H. Creech is the son of Thomas Creech and Celia Harrison.
I did extract this straight from the census and marriage index, but I can't guarantee the accuracy.
Hope this helps you.