I know nobody here has been on for a while, but I believe the surname to be Acathan rather than aCathan.
This Sara Acathan is likely to be Sara Acathan b.1737. She is from a strong jewish family from Amsterdam so although my data from the 1700s on this family is weak, it is probable that she is from Amsterdam. See
http://trees.ancestry.co.uk/tree/42188697/family?fpid=197654... for Sara Acathan.
I have specific interest in this Acathan branch as well as a new founded interest in Aron Vaz Dias if any more information could surface or be provided please.
Feel free to contact me here or email
raretiger976-familyhistory@yahoo.co.ukRegards,
Luke