This is the 8710th most frequent Russian word.
пейчинович
"Пейчинович" is a surname in Russian and does not have a specific standalone meaning.
The word 'Пейчиновичем' is the instrumental case form of the surname.
В школе я познакомился с Пейчиновичем.
I met with Pejčinović at school.
Here, 'Пейчиновичей' is the plural form of the surname, used to refer to a group of people with the surname.
Пейчиновичей было двое на постановке пьесы.
There were two Pejčinovićs at the play production.
Here, 'Пейчинович' is used as a proper noun referring to an individual's surname.