Juha and the satirical press

As is usual for those who read personality studies books, the question comes: Who is Juha? Is he a real person, or is he the imagination of a creative writer? And if he is real, in what era did he live? Is he Arab or non-Arab? Juha often appeared in his tales as a judge judging between disputes, or a farmer cultivating his land, or a merchant, or a friend of the king and the prince, or a wise man..
The appearance of the character Juha goes back to the first century AH, i.e. the seventh century AD, and it is of an Arab man named (Dujain bin Thabit Al-Fazari), and in heritage books it was said that he was able to convert to Islam, the client of Omar bin Al-Khattab, Hisham bin Urwa, Abdullah bin Al-Mubarak, and others.
Al-Shirazi said on the authority of Dujin bin Thabit: "Juha was a nickname for him, and he was handsome, and what is said about him is a lie to him."