According to Delton Blalock's book, and citing Steve Comptons previous post on this subject, the first two Comptons that were supposedly here were John Compton (b.1605) of Roxbury, MA and William "aka Weillium" (b.1622) of Gravesend, Long Island, NY.
Now according to an insightful post by Racoon, it opened my eyes to something I had been confused on myself.
The man who was William of Gravesend was NOT William of Monmouth. They are two different men. William of Gravesend was on the records until 1683. He was sworn in as constable in 1677. However William of Monmouth settled there in 1664. So it looks like that William Jr. who married Mary Bowne seems like the likely candidate to fit the bill as William of Monmouth. William Jr. b.1644 d.1699.
It seems like many people have molded William I and II into one person,and I have to admit I had them confused as well.
The William of Middlesex d.1694 in Woodbridge,NJ who married Mary Wilmot was the son of John Compton of Roxbury,MA and Susan Freeman.
Now I'm sure that William of Gravesend and John of Roxbury have just as many descendants but is there really any proof that those two men were related?