Several years ago I proved John A. O’Sheal was a descendant of Jethro O’Sheal, RWV.
While I have not yet proven through documentation that John A. O’Sheal was the great-grandson of Jethro O’Sheal, there is a preponderance of evidence supporting my contention.

Item # 1:
In 1855 John A. O’Sheal wrote a letter of inquiry to the Commissioner of Pensions in Washington, DC. He asked if any pension money was due the heirs of Jethro O’Sheal.  John A. O’Sheal would not have asked this question unless he had been a descendant of Jethro O’Sheal.
The letter was mailed from the court in Gordon County, Calhoun, Georgia, near Adairsville, Georgia.

Item # 2:
The advertisement above shows John A. O’Sheal was an attorney, and now we know why he had the capacity to inquire about the pension funds for the heirs of  Jethro O’Sheal.

Item # 3:
According to descendants of Elizabeth O’Sheal, daughter of Jethro O’Sheal, who married Tyrie Harrison, Elizabeth O’Sheal Harrison moved to Calhoun County, Alabama, with some of her family.
Elizabeth O’Sheal’s daughter, Charlotte Harrison O’Sheal and her husband, John O’Sheal, Jr., died sometime in the 1840s. It was reported their children moved with their grandmother, Elizabeth O’Sheal Harrison to Alabama, and John A. O’Sheal has been identified as one of their children.
Apparently, John A. O’Sheal, attended school in either Alabama or Georgia. He became an attorney. He traveled to Cass County (now Bartow), Georgia, where he met his future wife, Frances Ophelia Gaines near Gordon County, in the Adairsville area and married her in 1850.
From Cass County, Georgia, John A. O’Sheal and Frances Gaines O’Sheal traveled to various parts of Alabama and Georgia while John A. O’Sheal practiced law.

In 1850, John A. O’Sheal and his wife, Frances, were living in Cass County, Georgia.
In 1860, they were living in Jackson County, Alabama.
In 1870, John A. O’Sheal had died, and it is guessed he possibly died during the Civil War.

Item # 4
John A. O’Sheal was an attorney.
John A. O’Sheal lived in Cass County, Georgia. (1850)
John A. O’Sheal wrote a letter to the Commissioner of Pensions. (1855)
John A. O’Sheal lived in Columbiana, Alabama, and advertised for work. (1856)
John A. O’Sheal lived in Jackson County, Alabama. (1860)
John A. O’Sheal named his oldest son, Henry JETHRO O’Sheal.

Elizabeth O’Sheal Harrison moved to Calhoun County, Alabama. This area is approximately 50 miles from Columbiana, Alabama. I do not know the exact location of Elizabeth O’Sheal Harrison’s property. Therefore, she could have lived even closer to Columbiana, Alabama than 50 miles.