Don't know if you already found the information you were looking for. I do have the individual you are researching, though I do not have much information. I can tell you that he married on 6 July 1730 in San Gregorio de Cerralvo.
He was born about 1698 and Maria Colombina Molina de la Garza Sosa was born about 1710. Her father was Blas Molina de la Garza and her mother was Ana de Sosa Ruiz. Blas and Ana married on 21 April 1683 in San Gregorio de Cerralvo. Blas' faterh was Joseph de la Garza Rocha, and his father was Pedro de la Garza Rodriguez and Maria de la Rocha Vela. I suspect you can find additional info on Pedro and Maria as it is well documented.