This is the 7471st most frequent Russian word.
дарьи
"Дарьи" is the genitive singular or nominative plural form of "Дарья," a Russian female given name equivalent to "Daria" in English.
The word 'Дарьи' is used here as the name 'Darya' in genitive case to indicate possession.
Дарьи написала замечательное стихотворение.
Darya wrote a remarkable poem.
Here, 'Дарьи' represents the possessive form of the name 'Darya' to specify ownership of the books.
Мы нашли старые книги Дарьи на чердаке.
We found Darya's old books in the attic.
In this sentence, 'Дарьи' is used in the genitive case suggesting 'in honor of' Darya.