Curator's note dated March 2015 says he was not Rodrigo. Source? Documentation? You are in a minority but you may be right.
Here, for comparison, is how I have listed web "sources" on Familypedia:
http://klausjames.tripod.com/susanclinton.html - calls her "Sancha Rodriguez de Lara" with parents "Rodrigo Rodriguez de Lara (b. 1123) = Garcia de Azarga"
Sancha Rodríguez de Lara calls her "Sancha Rodríguez de Lara" and a headnote dated March 2015 says "She was NOT daughter of Rodrigo Rodriguez de Lara, conde de Lara e Elvira Garcia de Azagra." but those are still what the page shows
http://www.hull.ac.uk/php/cssbct/cgi-bin/gedlkup.php/n=royal?royal1... - which shows "Father: de Lara, Rodrigo Rodriguez, b. 1123" and "Mother: de Azagra, Garcia"
http://www.genealogics.org/getperson.php?personID=I00115171&tre... - citing The Plantagenet Ancestry, Baltimore, 1975 , Turton, Lt.Col. W. H. 54 and Les Ancestres de Louis XIV, 512 quartiers, Paris, 1981, Carretier, Christian. p 121 - but no grandparents