Greetings to all,

I am fairly new to genealogical research, but I am trying to establish solid proof a one particular line going back 15 generations. I have been able to establish many of the generations, but I am having some trouble with a few. I have searched this site (and others) and have read many of the forums on this site, which offered great help, but have not been able to locate documentation for some generations. I only included marriage dates for the moment, but can include other information, if needed. I will follow with the generations I am trying to link and find documentation for. I also realize that some names may vary as individuals sometimes shortened or used a variation of their surnames. Below is the lineage starting with myself:

1. Gabriel Brambila
2. Gabriel Brambila married Francisca Mendoza 
3. Gabriel Brambila married Sulema Garza in 1949
4. Gabriel Brambila married Josefina Garcia y Reyna in 1908
5. Jose Felipe Brambila married Florencia Contreras Cuevas in 1880
6. Jose Luis Brambila married Maria Feliciana Fregoso 
7. Jose Casildo Brambila married Maria Rita Rafaela de la Paz Garcia in 1828
8. Jose Bernadino de la Brambila de la Cueva married Maria Josefa Gomez
9. Jose Reyes de la Brambila married Margarita de Jesus de la Cueva de Benavides in 1763 in Tecolotlan, Jalisco
10. Juan de la Cueva de Mora married Rosalia Antonia Benavides Guido in 1741 in Tecolotlan, Jalisco
11. Juan Beltran de la Cueva married Juana de la Mora in 1711 in Tecolotlan, Jalisco
12. Beltran Fernandes married Tomasa (Tomasina) de Velasco de la Cueva in 1684 in Tecolotlan, Jalisco
13. Francisco de Velasco y Temiño married Geronima de la Cueva; they lived in Tecolotlan, Jalisco
14. Alonso de Velasco y Zuniga married Ana Flores de la Torre y Temiño; they lived in Juchipila, Zacatecas 
15. Diego Flores de la Torre married Angela Temiño de Velasco 
16. Pedro Pacho Rodriguez married Maria Ana Temiño de Velasco Alcocer y Bañuelos

As I mentioned above, I have been able to make a connection, with documentation, for many of the above generations (1 - 10). I am having trouble showing, with documentation (birth/baptism/marriage records), the connection for the following generations (11 - 14): 

11. Juan Beltran de la Cueva was the son Beltran Fernandes and Tomasina de Velasco de la Cueva

12. Tomasina de Velasco de la Cueva was the daughter of Francisco de Velasco y Temiño and Geronima de la Cueva

13. Francisco de Velasco y Temiño was the son of Alonso de Velasco y Zuniga and Ana Flores de la Torre y Temiño

14. Ana Flores de la Torre y Temiño was the daughter of Diego Flores de la Torre and Angela Temiño de Velasco

If anyone can assist it would greatly appreciated. 

Thank you in advance for the help,

Gabe Brambila