Thank you for your message and the information but I'm afraid I can't help. The earliest that I go back on the SEABROOK side is to Robert SEABROOK, born before 1774, who married Sarah ??? but I have no other prior information on them.
I do know that they had two children, Emily and William, and possibly more. William was my Great Great Great Grandfather and married Susannah AVERY. I suspect that they are descended from the Buckinghamshire family but I have yet to find the link.
I will certainly keep your message with my records and if I can help in the future I will let you know.