I am researching a Carwithy family that was in Boston, MA and Salem, MA in 1640's/50's, then David Carwithy who m. Grace Alcock/Alcott went to Southold, Long Island, NY. There his daughter, Elizabeth, married William Cranmer. They went to Elizabethtown, NJ. David also had sons: David and Caleb and a daughter, Sarah, who married a Curtus/Curtis. Digory Carwithy might have been the father of David Carwithy. Digory was the master of the merchant ship: The New England Merchant. He married Elinor Mather in London. I believe the family was from Devon and maybe Corwall, England.