I see no sources indicating Hernando de Castro's parents to be Count Fernando Rodriguez de Castro of Lemos, or Teresa de Andrade.
These are the sources for his "father" Count Fernando Rodriguez de Castro of Lemos:
1.) https://fabpedigree.com/s042/f627037.htm
2.) https://gw.geneanet.org/sanchiz?lang=en&p=fernando&n=bragan...
These sources show no Hernando de Castro. And these were the sources I found of Count Fernando so far.
I am wondering whether Hernando should be disconnected from Count Fernando and Teresa de Andrade for right now because of the insufficient amount of sources proving him to be the son of this couple.