morillo.murillo familiies

stumped as to where to look for and ancestrys hints are a bit off for my ways of thinking. looking for information pertaining to the families of francisca moreles and pedro murillo or morillo . the daughter known in records as francisca morillo is 3rd great grandma and married rumauldo coronado. they in turn had a child that is my 2nd great grandfather as francisco coronado. family search places pedro morillos birth as villa de cos , zacatecas mexico as 1825 but no records been found after that concerning any parentage of him or wife known as francisca morales.