I have had this Isaac "hanging" in my files for over 25 years and have yet to hook him up to the Janvier/January family of Pa/Del. I read where someone said he came directly from British Isles and maybe that is correct and is why we have no connection. If he came into one of the ports then there should be a record in the libraries that hve genealogical records. Chances are he came in thru Charleston, Philadelphia, Boston as in those days those were the main ports. also maybe New York.Next time I go to Sutro Library in San Francisco, I will look. Jeanne ps..I do have alot of this line going down.