So I can assign the spelling of a person's family name = the spelling given at his death?
And what about other spellings = Input (Example) ; Fre|Free|Frei|Frey|Vre|Vree|Vrei|Vrey|Vry|Vrye ?
That would be a mammoth task for me!
In addition to the ten or (sometimes more) different spellings of a family name, there are just as many spellings of a person's first name - in ALL possible combinations.
The example of a relatively short name (three, maximum four letters) "Fre, Free, Frei, Frey, Vre, Vree, Vree, Vrei, Vrey, Vry, Vrye" is still relatively simple... and it is ONLY about the family name.
Add to this the different possible spellings of the first names - and the fact that family names, if they existed, were often not mentioned in writing for several generations...
In former times in East Frisia only very few people had a 'real' family name (even that was sometimes not mentioned!), otherwise the patronymic naming was valid:
Dirk Gerdes > Gerd Dirks > Johann Gerdes (Gerds, Geerds, Gerts, Geerts, Gerdts, Geerdts, ...) > Jann (Jan, Jans, Janns, Jannes, Johan, Johann, Johannes, Johansen, Johanssen, Joke, ...) Janssen (Janßen, Jansen, Jannsen, Janshen, Jaszen, Jantzen, ...)
Many duplicates remained (remain) undiscovered, even if you had drunk a whole or even two bottles of wine!
Translated with
www.DeepL.com/Translator (free version)