This is the 4027th most frequent Russian word.
львовой
"Львовой" is not a standard Russian word. It might be a misspelling or a proper name.
The word 'Львовой' here refers to a female individual's last name in the instrumental case, used to indicate 'by', 'with', or refer to an action involving that person.
Львовой поступила на работу в крупную компанию.
Lvova got a job at a large company.
'Львовой' refers to the female last name in the instrumental case, aligning with the grammatical role in expressing pride in her accomplishments as belonging to her.
Мать гордилась успехами своей дочери, Львовой.
The mother was proud of her daughter's success, Lvova.
In this sentence, 'Львовой' refers to the last name of a woman, used in the genitive case after the preposition 'у' to denote possession or source.