Link existing list properties to notes

What I’m trying to do

I have a meeting Template with property participants in which the first and last name of a participant is documented.
Now I started to create some people notes.
The Notes have the same first and last name as the file name. Is there an easy way to bulk change the list entries over all files to a link to the actual people note?
In addition to that. Can I somehow do something that if I created an already existing entry it will be automatically linked and if I create a new one a new people note is creating a template?

Things I have tried

Unfortunately, don’t know how to start here

Thank you so much for the help!

Is there something missing?