I wish I knew the answer!
I do not know the children of John I and John II, only that John III had Benjamin. I will
check some of the other (undocumented) material I have and see if I have a clue as to the
children John III had besides Benjamin. We know Benjamin's children, but I'm
unsure as to his siblings. Thomas is a name repeated a great deal in this line, so it may
well be a brother to Benjamin or an uncle. David Bowles had a son later in life by Winnie
Rice named Thomas Bowles, so there is another one to count.
I have never seen good documentation and proof as to who Benjamin's father and
grandfather was, only speculation.
It was good to hear from you. Let's compare ancestry again.