As I went through a few days of emails I noticed questions about the Inquistion I might have some leads for you.
On Sephardic . com the man who hosts the site has cumulated huge book of persons, He used to be very good about e-mailing names in certain locals if he found them in his research. Their are also lists of surnames and how many times in history and it is a good spring board.

Cecil roth author historian Of sephardic/conversos

Bancroft library isn't the only one who carries Bancroft Most local univerities and bigger colleges have vols on there shelves I can't stress enough check your local connections before you spend $$$ to work with the Bancroft.

For those members in New mexico check Zimmerman at UNM

Good hunting
mari