My gggg grandmother was Elizabeth CLANTON who married Matthew DUKE, Jr. My line is as follows:

1) William CLANTON, Sr.,b. 1665
2) Edward CLANTON, Sr., b. 1697
3) William CLANTON, b. 1722
4) Elizabeth CLANTON, b. 1748
5) Matthew DUKE, Jr., b. 1785
6) Melvina Dunseath DUKE, b. 1817
7) David VOWELL, b. 1851
8) Ludie Paradine VOWELL, b. 1878
9) Lillian CLINARD, b. 1910

My Elizabeth's grandfather, Edward, was the brother of John CLANTON, Sr., the gg grandfather of Ike and Billy CLANTON.
Here is the info I have on Ike and Billy's line.

1) William CLANTON, Sr, b. 1665
2) John CLANTON, Sr., b. 1708
3) John CLANTON, Jr. b 1758
4) Henry CLANTON
5) Newman Haynes CLANTON
Children of Newman Haynes CLANTON and Mariah Sexton KELSO:
i. John Wesley CLANTON, b. 1841
ii. Phineas Fay CLANTON, b. 1845
iii. Joseph Isaac "Ike" CLANTON, 1847
iv. Mary Elsie CLANTON, b. 1851
v. Esther Ann "Hettie" CLANTON, b. 1854
vi. Alonzo Peter CLANTON, b. 1858
vii. William Harrison "Billy" CLANTON, b. 1862

Ike and Billy were the leaders of the CLANTON gang, and Billy was killed at the Gunfight at the OK Corral (Doc HOLLIDAY and the EARP brothers). Billy is said to be buried in Boothill Graveyard in Tombstone, Arizona. Hope some of this helps.
Brenda