Yesssss!!!! We are related.Your g-g-grandfather Perfecto Mireles and my g-grandmother Isabel Mireles shared the same parents.
I have their parents listed as Concepsion (Encarnacion) Mireles and his wife Adelaida Casares.
Concepcion's parents were Paulin or Paulino Mireles and Eusatquia Davila.
Adelaida's parents were Apolonio Casares and Ysabel Mireles (after which my great grandmother Isabel was named).
I have no birth or marriage dates from any of these, but was able to connect them simply from Linares, Nuevo Leon baptismal recordsfor their children.
If any one else thinks they might be related please contact me here or at my e-mail address.
BTW, the Mireles and Hernandez and even Gonzalezes from Linares seem to have married over and over. Siblings from one family married into another family of siblings, as did second and even first cousins.