Names of people preferably are written like this:
FamilyName, PersonalNames
You can of course write names in different ways when you write texts.
Let's assume you made an internal link to the biography page of this person, and you wrote the name like this:
PersonalName FamilyName
,
then please make a redirect page that directs to the page with the official name.
How to make a redirect page?
Click on the red link and it opens the page with the name PersonalName FamilyName
In that page write:
#REDIRECT [[FamilyName, PersonalNames]]