This is the 3935th most frequent Russian word.
джеффри
"Джеффри" is a Russian transliteration of the English name "Jeffrey."
The word 'Джеффри' is used as a proper noun and subject of the sentence, referring to the person performing the action (buying a book).
Джеффри купил новую книгу по истории.
Jeffrey bought a new book on history.
The word 'Джеффри' is used as a proper noun and direct object of the sentence, standing for the person being seen in the park.
Я видел Джеффри в парке вчера.
I saw Jeffrey in the park yesterday.
The word 'Джеффри' is used as a proper noun and indirect object of the sentence, indicating the person involved in the discussion.