Jauregui from Nochistlan to Mexticacan

In search of any Jauregui descendants that  originated in Nochistlan then carried over to Mexticacan & Cañadas Jalisco.  Ancestor Nicolas de Jauregui, from Los Yugos Cañadas, born around 1790, is who we are researching.  Married 1st wife, Petra Gomez. 2nd wife, Juana Yniguez. Searching for  maternal & paternal records for Nicolas Jauregui as his mother was recorded as Juana de Jauregui. He must have taken his mother's surname. 

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San Juana Jauregui and J Encarnacion Yniguez are the parents of Nicolas Jauregui married to Tomasa Jauregui. 

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Thank you! Can you please tell me where this record is and what year?  We only knew of Nicolas other 2 wives, not Tomasa. The only record we've seen for Nicolas's mother Juana, was that she was recorded as Juana de Jauregui. I assume she was not married by church to Encarnacion Yniguez, therefore Nicolas was not given his father's surname? There were so many Jauregui's in that area.