Apellidos help!

Dear Group,
While researching my father's side---
Josse de Jesus Esteban Garza Cantu 01/04/1798, his parents were named as:  Josse Francisco Garza Falcon y Tixerina, and the mother as:  Ana Maria Cantu Rio y Serda y Almandos.
   I don't know how to decipher who are the grandparents, etc. 
This is the longest name I've come across and any help would be appreciated.    Thanks so much,   Alice