Esther, From my understanding the town known as Hacienda Topo de los Ayalas is the ancient name. It later became known as Villa General Escobedo. I don't know the date that happened.I have not done any records searching in Mexico. My last visit to Monterrey was back in the mid 1950's.My grandparents and father were from that area known as Villa General Escobedo also known as El Topo Chico. I was born here in Texas. I've also heard that during the revolution many municipal records were destroyed. Is there any genealogy websites in Mexico?