This is the 2784th most frequent Russian word.
никитин
"Никитин" is a Russian surname.
Proper noun - used as a surname to refer to the person who authored the book.
Никитин написал интересную книгу.
Nikitin wrote an interesting book.
Proper noun - used to indicate a person whose name is honored in the name of the museum.
Мы посетили музей имени Никитина.
We visited the museum named after Nikitin.
Proper noun - referring to an individual, Nikitin, as the doer of the action.