This is the 7832nd most frequent Russian word.
казакова
"Казакова" is a Russian surname, typically meaning "Kazakov's" (feminine form) or relating to "Kazakov," derived from "казак" (Cossack).
Here, 'Казакова' is used as a last name, likely indicating the subject is female, who performed the action in the sentence.
Казакова прочитала интересную книгу.
Kazakova read an interesting book.
In this usage, 'Казакова' appears as part of a proper noun, naming a street.
Казакова улица - одна из самых красивых в городе.
Kazakova Street is one of the most beautiful in the city.
Here, 'Казакова' is a possessive form referring to someone's work, using a last name to indicate ownership.