To my knowledge, and historical knowledge, I believe that George III had no illegitimate children, he only had 15 children with Queen Charlotte. However, on his profile, it shows that he has illegitimate children connected to him.
Should these profiles be disconnected, because there doesn't seem to be enough data to support it.
This profile is one of two or three perhaps falsely connected to King George III
And of course here is George III
George III, King of the United Kingdom of Great Britain and Ireland
I hope that you can help,
Kind regards,
Adam