I can add a to the profile of Hernando Pedro de Cortés y Ramírez de Arellano. This is who I can add:
These are the sources I am using:
Should I contact one of the pre-1700 projects or know about any style guidelines before proceeding? Thank you!
This help page might answer your question
https://www.wikitree.com/wiki/Help:Pre-1700_Profiles