Just out of curiosity, what made you jump to that conclusion?
Code:
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# Expansion Features
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- Child Naming Buttons:
- When a child is born, you have new options of choosing an appropriate name
- Random: Will randomly pick a name from the culture list
- Name after Parent: Will name the child after the father/mother
- Name after Grandparent: Will name the child after any grandfathers/grandmothers
- Name after random Ancestor: Will randomly pick a name from any member of your dynasty
It's mentioned here in the patchnotes as an expansion feature. It's not hard to draw the conclussion that it's behind a paywall. Especially since the field under it is "free features".