I came across a Petra Gonazales (b. 1894) who was married to a Pedro Silva (b. 1890) in my family line. Pedro Silva is the brother of my great grandfather, Bartolo Silva (b. 1891).
From information from my father, our family is from the area of Yuriria, Guanajuato, Mexico.
Not sure if this is helpful to you though. Please let me know. I am also searching for Silvas from this area.