Victor Velos and related famililies: brick walls

maria antonia velos in family search and or ancestry.com who is married to rafael martinez is my 5th great grandparents. maria antonia velos comes from a area known as grangenos, mexico in 1804. parents from what i had found so far happens to be victor velos or vela and maria guadalupe cordero. parents of victor velos was known to be as nazario velos and dorotea garcia? any areas i should be looking for? so far it is a dead end