Formal/Official:
* Ионатан (Iоnatаn) - This is the most direct translation of "Jonathan" and is considered the most formal way to write the name.
Informal/Phonetic:
* Джонотан (Dzhonatan) - This is a more informal way to say "Jonathan" and is closer to the English pronunciation.
* Джони (Dzhani) - This is a short and informal way to say "Jonathan" and is more common in spoken language.
Ultimately, the best way to say "Jonathan" in Russian depends on the context and your personal preference.