It's the same as English: Jonathon.
In Polish, the name Jonathon is spelled "Dżonatan".
Johnathan Johnithan Jonnethan Johnathon Jonathon Geonathan
The name "Frank" in French is spelled as "Franck."
In French, the name Oliver is spelled "Olivier".
To ask someone how to spell their name in French, you can say "Comment tu épelles ton nom ?" which translates to "How do you spell your name?"
In Polish, the name Jonathon is spelled "Dżonatan".
The usual spelling of the male given name is Jonathan, but also Jonathon and Johnathon.
Johnathan Johnithan Jonnethan Johnathon Jonathon Geonathan
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Jonathon Gentry's birth name is Gentry, Jonathon.
Jonathon Dutton's birth name is Jonathon Peter Dutton.
Jonathon Goodro's birth name is Jonathon Ian Goodro.
Jonathon Gregory's birth name is Jonathon Miles Gregory.
Jonathon Kelley's birth name is Jonathon Martin Kelley.
Don't know about 'Jonathon' (even in English!), but 'Jonathan' = 'Jonatan' or 'Jonatas' (accent on the final 'a')
It's not a French name