Warning: the following is highly speculative and based on the flimsiest of evidence.
I was poking around ancestry I found an email attached to a faded photocopy of a page in a family bible. The email detailed the Bible's origin and current location and transcribed the page. The page lists the births and some deaths of the family of John A. and Anna Bagley. It also include the family of Anna's second husband, Rev. Samuel Olney. Assuming a parent child relationship (not explicitly stated, Chapins C Bagley (Cyrenus Chapin) is the oldest son of the marriage between Anna and John. John was born in 1788 and died in 1821. A note states that Anna's obituary states she had five sons and two daughters. At least four of those sons are sons of her first husband John Bagley. Other materials online put John's birth in PA.
So conjecture: Let's say John A Bagley the father of Cyrenus Chapin Bagley was born in Luzern county, PA. Then it is quite possible he is the boy in the household of Richard Bagley in the 1790 census. Luzern county was settled by people from Connecticut. The two colonies/states contested the area until after the end of the American Revolution. If Richard Bagley returned to Connecticut after 1790, then he could have been in Hartford for Edward Bagley's birth. If Edward Bagley who migrated to Utah is also the son of the same Richard Bagley, John A Bagley would then be the older brother or half brother of Edward Bagley. This is potentially testable, Cyrenus Chapin has brothers who could have living male descendants. If it turns out the two families are related, it would at least indicate John and Edward would be at least cousins.
If John and Edward are brothers it would indicate a earlier birth date for Edward. While it's not unheard of for men to father children into their 60s, the 1800 or 1801 date would be more plausible than the 1810 or 1815 date, if Esther is also the mother of John.
