I too have been searching for De Los Santos. I understand that De los Santos and De los Santos Coy are two different families. Santos Coy families were in Bexar before the Canary Islitas came to Bexar.
If you have found anything in the line of Maria Josefa De Los Santos Coy born btw/abt 1771 and 1775, I am looking to find out who were her parents or who were her children?