Where does “Grigoryan” come from?

Grigoryan (English) comes from Armenian Գրիգորյան, from Armenian Գրիգոր, from Old Armenian Գրիգոր, from Ancient Greek Γρηγόριος, from Ancient Greek -ῐος, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “Grigoryan”, step by step

StepLanguageWordMeaning
1ArmenianԳրիգորյան—
2ArmenianԳրիգորgiven name equivalent to Gregory
3Old ArmenianԳրիգոր—
4Ancient GreekΓρηγόριοςwatchful, vigilant
5Ancient Greek-ῐοςbelonging to; of”, “belonging to”, “pertaining to
6Proto-Indo-European-yósCreates adjectives from noun or verb stems
Every word from Proto-Indo-European -yós →Every word from Ancient Greek -ῐος →Every word from Ancient Greek Γρηγόριος →