Does anyone have any information on “Julio Mercado” born in the early 1800’s in Jerez, Zac.? He was married to Francisca Pacheco Alvarado.

Does anyone have any information on “Julio Mercado” born in the early 1800’s in Jerez, Zac.? He was married to Francisca Pacheco Alvarado. I found several of their children’s marriage and death records, but not their birth records because there is a gap in these church records from 1850-1866 in Jerez. The films on this site show a listing of these missing years, but I did not actually find these years’ records in them. His death record lists his parents as “Gerardo Alvarado – not Mercado” and Eufemia Rodriquez, but I question this since that is the exact same name of the informants ‘maternal’ grandfather. I can not find any records of any kind for these parents; Gerardo and Eufemia. His age at death of 105 in 1916 is also questioned since he lists his age in earlier documents as being born in the late 1820’s and/or early 1830’s. I’ve hit a brick wall for years on this line. Cynthia