Ordoño Garciez de Aza - Parents

Is there any documentation proving this Ordono was the son of Garcia and Urraca?

Asking because this Wikipedia page only lists two daughters for that couple and a possible son but this Ordono isn't mentioned as their child and there are no notes or references in his About section.

https://es.wikipedia.org/wiki/Garc%C3%ADa_Ord%C3%B3%C3%B1ez

Thanks in advance for any clarification / documentation.