This is the 7513th most frequent Russian word.
джоном
"Джоном" is the instrumental case of the name "Джон" (John) in Russian, meaning "by/with John."
The word 'Джоном' is used in instrumental case to indicate John as the doer of the action.
Джоном был придуман этот проект.
This project was conceived by John.
The word 'Джоном' is instrumental case denoting companionship or association.
Я поделился секретом с Джоном.
I shared the secret with John.
The word 'Джоном' here signifies the person with whom the action (interesting conversations) consistently occurs.