Barbara my Castanon line came from Valparaiso, Zac to Jerez, Zac in abt 1750 but I haven't found any records for them before that. I do not have the Gertrudis Castanon you ask abt in my records. I will let you know if I ever find the records for the earlier years in Valparaiso.
Linda Castanon-Long
Castanon Line
Linda, you may already have seen these, but thought I'd pass these on just in case.
https://familysearch.org/pal:/MM9.3.1/TH-1-15273-25099-6?cc=1804458&wc=…
https://familysearch.org/pal:/MM9.3.1/TH-1-15261-20643-50?cc=1804458&wc…
https://familysearch.org/pal:/MM9.3.1/TH-1-15261-19610-72?cc=1804458&wc…
FYI... Benito is married to my 5th great grand Aunt
Raul