This is the 3974th most frequent Russian word.
ивлеевой
The word "ивлеевой" does not have a direct definition in English as it seems to be a proper noun or possessive form (e.g., related to "Ивлеева," a surname).
Here, "Ивлеева" is the surname of the author, showing possession or association in standard nominative case usage.
Анна Ивлеева написала новую книгу, которая стала бестселлером.
Anna Ivleeva wrote a new book that became a bestseller.
In this context, "Ивлеев" is the base form of the surname, masculine version indicative of the individual's gender.
Вчера на выставке я встретил художника с фамилией Ивлеев.
Yesterday at the exhibition I met an artist with the surname Ivleev.
"Ивлеевых" here is the plural form of the surname used to denote a family or group associated with it in the genitive case.