My Castilla family living in Monclova around 1850's lived in Hacienda de Adjuntas (Abasolo, Monclova, Coahuila area).
I have my tree Sanchez/Sosa/McNamara Tree open to public, feel free to look. I have attached some photos of original documents from Santiago Apostol Parish Church. We might be related. I have a Carmen Castilla married to Juan Antonio Franco.
Juan Antonio Franco's father Josef Manuel Franco(1784) married Manuela Ozuna(1808).
Let me know whether these names match your names. By the way, there were not many Franco's in the church records & even fewer Ozuna's, but I only looked in the Santiago Apostol records.