San Julio Álvarez Mendoza Family

I received an email from a relative asking me if we were related to San Julio Álvarez Mendoza. I was embarrassed to say that I had no knowledge of this saint so therefore could not know of any family relationship. Does any one know his family tree? I only know that he was born in Guadalajara on 20/Dec/1866 to Atanasio Alvarez and Maria Dolores Mendoza. Is he part of the Alvarez Tostado family? Does anyone have stories to add about why he is considered a saint?
Thanks.
R. A Ricci