Your great grandfather was my grandfather's (Lorenzo Cazares Madrid) brother. Their father was Bonifacio Madrid. Their mother was Refugio Cazares. Bonifacio's father was Luis Madrid and his wife was Dolores Bustillos. Luis' father was Gabriel Madrid and his wife was Manuela Marquez. They came from Mexico and settled in San Elizario on a land grant that was given to 12 families that settled there. If you have any other questions please write me directly.