Petrusewicz is a Polish gender-neutral surname of Eash-Slavic origin.
Archaic feminine forms: Petrusewiczowna (maiden name), Petrusewiczowa (surname by husband).
It should be distinguished from the spelling Pietrusiewicz which conforms to the Polish phonology, which is usually a by-name in the noble Polish clan Wysoczański.
It is a patronymic surname derived from the East Slavic given name Petrus', a diminutive of Piotr/Petro/Piatro (Peter).
Latvian: Petrusēviča (feminine), Petrusēvičs (masculine) Notable people with this surname include: