Claudia,
 
My mother used to speak of an adoption further back on our lines.  She said the surname used was Renteria but because the direct line ancestor was raised by the Reynoso family he took on their name out of gratitude, thankfulness and respect for this family.  This information was passed down.  I don't go along with this story.  As you check the ages of the Renteria and Reynoso men when they died they were older men.  As I looked at the children, they would have been teenagers.  I found one direct line that would have been around 14 years old at the time of death of his father.  When you stop and think about it, why are there so many in the family that can be found by both names?  I believe that Renteria was the surname of a great grandmother somewhere down the line and as you find so often that name was carried on.  With my own grandfather Francisco Reynoso, I have found him listed as Reynoso and Renteria on different documents.  I have found
that to be true on his father, grandfather and so on.  Someday I hope we will be able to solve the mystery.
 
I still keep searching for those records that go back to the 1600s.  I believe we will find our answers there.  Also since the Reynoso and the Renteria men were military there should be information that could help us on possibly enlistment records or other military records.  Possibly wills, probate records.  Marriage information records are also good if we can locate them further back in time.
 
My grandfather used to tell me that the records for the family could be found in Jalisco. 
 
I have been able to piece the family records together from padrones, civil records, and of course catholic church records.  I have been able to extend my Serrano line by searching through land records.  They are in script, a great deal of abbreviations amd are hard to read.  One can usually pick out the information needed or have someone help you that knows the language better and can understand the old writing.  
 
Sorry I could not be more help Claudia. 
 
 
 
 
----- Original Message ----
From: Claudia_Reynoso
To: research@lists.nuestrosranchos.org
Sent: Sunday, July 27, 2008 11:12:23 PM
Subject: [Nuestros Ranchos] for Irene Sweet (confirmed Prima)

Irene (prima):
I looked at our lineages carefully and this is how you and I are related:

My 3rd great-grandfather, JOSE ANICETO REYNOSO, was the brother of your 2nd great-grandfather, JOSE GREGORIO REYNOSO.  Their parents were TORIBIO REYNOSO and MARIA NORBERTA ROMERO.

Can you help me decipher the Reynoso-Renteria name swap?  I am still struggling with this.  A few Reynosos are recorded are Renterias in official records. 

What do you know?