This is the 9808th most frequent Russian word.
янкелевич
"Янкелевич" is a patronymic surname in Russian, meaning "son of Yankel," where Yankel is a Yiddish form of the name Jacob.
In this sentence, 'Якелевич' is used as a patronymic, which is a name derived from one's father's first name, reflecting a common naming tradition in Russian culture.
Иван Якелевич сегодня успешно защитил свою диссертацию.
Ivan Yakelovich successfully defended his dissertation today.
Here, 'Якелевич' functions as a surname, indicating the author of the literary article.
Мы прочитали интересную статью Якелевича о литературе.
We read an interesting article by Yakelovich about literature.
In this example, 'Якелевичи' (plural form) is used to refer to a family or group of people with the surname 'Yakelovich', common in Slavic languages to denote association.