The story
- Ancient Greekπέτρος (pétros)
- Ancient GreekΠέτρος (Pétros)
- ArmenianՊետրոս (Petros)
- ArmenianՊետրոսյան (Petrosyan)
- English todayPetrosyan
Borrowed from Armenian Պետրոսյան (Petrosyan), from Պետրոս (Petros, “Peter”) + -յան (-yan). The forms with B- reflect the Western Armenian pronunciation.
Etymology from Wiktionary, CC BY-SA 4.0.