Tricia - Well, I can tell you what I "believe" as well.Thelma's book had some real problems with the first generation or two.She listed a Joseph Leisure, born in 1732 with a son, John, b. in Frederick County, MD about 1772, also with a son, John, b. in Pennsylvania and d. in North Carolina.That Joseph she had attributed to an Abraham LeSueur, born in 1670.The Abraham born in 1690, she said did not belong to this Leasure family at all.I however, believe he does belong to this family and that Thelma skipped a generation between the Abraham (1670) and the Abraham (1713).I think maybe the family originally came into this country through Carolina much earlier than the middle 1700s, but rather than settle permanently in a Catholic colony (after all they were fleeing the Catholic church's persecution in Europe), they migrated northward to Maryland and Pennsylvania, where the Quaker colony was far more open-minded regarding religious freedom.
I can't prove this theory, however.So, like Thelma, I started with the Abraham Leasure b. in 1712 or 13 as the first generation settler in Pennsylvania, with a date of approximately 1751 in Westmoreland County.
On comparing my data base with what you wrote in your e-mail, I see that I may have also skipped a generation because I have Joseph (the son of Abraham born in 1690) being born in 1732 and his son, JOHN, being born in 1772.Those dates would make Joseph 40 when son JOHN was born, which isn't too unlikely, but I also have siblings of son JOHN born as late as 1792, which would make Joseph 60 years old when his youngest child was born.I think there must be an intermediate generation that I have missed for some of these younger children.
As I said, I have no concrete evidence on these earliest Leasures either.I tried to sort out the information in Thelma's book to come up with the most logical sequence I could, but I'm aware there are still some real problems here, so like the first edition, I chose to begin with the Abraham born ca. 1712.
It finally came down to making a choice between going with the data I had to add to more recent generations, or to table the project indefinitely because concrete evidence is still missing for the 1600s.