I am a descendant of William Wright (1707-1776) of Augusta Co, VA. He may have married Margaret Black or Margaret Malcolm (I discuss the issues involved on a webpage for those interested: http://users.hal-pc.org/~wmewrght/wmwright.html.http://users.hal-pc.org/~wmewrght/wmwright.html.)
Never assume that information on ancestry is correct. The family trees are full of garbage and cannot be replied on. If the submitter provides documentation (seldom done), then verify it.
John Black did buy 738 acres in Beverly Manor in Augusta Co on 31 May 1749 (Chalkley, III:275) ftp://ftp.rootsweb.com/pub/usgenweb/va/augusta/court/3court27.txt
John Black made his will on 15 Feb 1758. It was produced in court in Augusta Co 16 Mar 1758 (Chalkley, III:230). I am not entirely clear what all the verbiage in Chalkley's abstract means. It would be a good idea to read the original recorded will on microfilm from a Family History Center. I have done this with all the references to my Wrights. But Chalkley says that David Black was "qualified" as Executor. That suggests to me that David was of age, 21 or older in 1758. The will names John's wife as Isabell.
The children named in John Black's will are: Sons: David and John, Samuel. William Brown is also called son, but may have been a son-in-law. No daughters are mentioned.
As far as a man having a child born when he was age 60, it could happen. But the mother would have to have been under 50 for the birth to be accepted without extraordinary proof. I have an ancestor who fathered a child at age 60, although there are some "comic book" trees on ancestry that show he was 75!
David's will is dated 3 Nov 1769 and produced 19 Dec 1769 (Chalkley, III:112). His widow Elizabeth did not think her husband was in his right senses when he made the will. On the next page of Chalkley, James is named as a son/orphan of David. James is under age as a guardian is appointed.
Chalkley, III:345 shows John Black selling 210 acres in Augusta Co to his son John Black plus 165 acres in Beverley Manor to his son James. Is this the same John Black or another? How do you determine which John (if there were two men) was your ancestor?
With respect to the repetition of given names from one generation to another. Your Black ancestors from the 1700s, if Scots-Irish, undoubtedly followed traditional naming patterns. My Wrights did so for the first three generations in America. Eldest son named for his paternal gf, second son for maternal gf, eldest dau for paternal gm, second dau for maternal gm.
My immigrant ancestor, William Wright of Augusta in his 1776 will named his sons in birth order and named the eldest son, executor. If John Black did the same in his will and assuming Chalkley's abstract maintained the same order of names, then David was the eldest, and John the second son, with Samuel being the youngest. But I can't say that all these early will's named sons in birth order like William Wright did.
Looking through Chalkley there appear to be multiple men named John and James Black in Augusta Co at this time. We have had a difficult time separating multiple men named William Wright in the early records. For example, there were at least two unrelated William Wrights in Augusta at this time, and three unrelated William Wrights in Bourbon Co, KY, in the 1790s. How do you identify which John Black in the records is your ancestor?
The problem continues and is compounded as the families moved on. How do you trace the migration of your Black ancestors from Augusta to South Carolina and then to Alabama and differentiate their identities from other men with the same names?
Tracing families back to Ireland in the early 1700s and earlier is almost impossible. Ireland has experienced over 1,000 years of civil wars. Most early records have been destroyed in the process. I would want to verify the sources that name John Black's father and grandfather and how their years of birth were determined? What is the source of Isabell's maiden name and her birth in England?
We have a lot of wonderful tools for genealogical research today. The internet has made me lazy as I no longer spend all my research time reading microfilms and digging through books at the library. You can use DNA testing to prove that you and David have a recent common ancestor. We had to do this to prove with certainty which of the William Wrights in Bourbon Co, KY, in the 1790s was the son of the immigrant William in Augusta.
I hope this is helpful. I wish I could find a Margaret (Black) Wright among the Blacks in early Augusta.