Where does “Kirill” come from?

Kirill (English) comes from Russian Кири́лл, from Ancient Greek Κύριλλος, from Ancient Greek κῡ́ριος — main; major; primary; principal.

Ancestry of “Kirill”, step by step

StepLanguageWordMeaning
1RussianКири́ллSaint Cyril apostle to the Slavs and inventor of the Glagolitic alphabet, which served as the basis for the Cyrillic alphabet
2Ancient GreekΚύριλλος—
3Ancient Greekκῡ́ριοςmain; major; primary; principal
Every word from Ancient Greek κῡ́ριος →Every word from Ancient Greek Κύριλλος →Every word from Russian Кири́лл →