NameGeorge Robinson 
Research notes for George Robinson
Benjamin Robinson, brother of George, had a son James that all local sources say married Betsy Fennell who they believe was a daughter of Nicholas Fennell Sr. They can’t prove it and hit the same stumbiling block in this belief that I did which is that Nicholas’ will names only daughters Mary and Nancy. So they speculate that Mary was Mary Elizabeth called Betsy.
In any event, James and Betsy are not Lawther ancestors, but they are important to that ancestry because Margaret Robinson says in her Revolutionary War widow’s pension application that the record of her birth was in the family bible which was destroyed in a fire at her brother James’ house. And the only James I can find living in the area in that time period of an age in the range of Margaret is James who married Betsy. A common pattern back in those days was that siblings often married siblings. So everything would fit like a glove that Betsy and Nicholas, children of Nicholas Sr. married James and Margaret, children of Benjamin Robinson and Alice Poitevant.
The problem is that Margaret is never mentioned among the children of Benjamin in his land settlement that occurred after his death or in the will of Alice. There does seem to be one child of Alice with an unreadable name, but this is a slim straw on which to presume that Margaret was her daughter.
My Comments notes for George Robinson
I believe George is the only other child of James and Tabitha to have been old enough to have children by 1772. I do not know how old George was but he seems to be mentioned in an adult context by the 1760’s.
George died young, though. There does not seem to be any record of his children. However, when his father died the guardian of those children, six in number, petitioned on their behalf for a share of the estate. My guess -- and that’s all it is - is that among those unnamed minor children were a daughter named Margaret and a son named James.