Where does “Serguei” come from?

Serguei (Portuguese) comes from Russian Серге́й, from Ancient Greek Σέργιος, from Latin Sergius.

Ancestry of “Serguei”, step by step

StepLanguageWordMeaning
1RussianСерге́йSergius
2Ancient GreekΣέργιος—
3LatinSergius—
Every word from Latin Sergius →Every word from Ancient Greek Σέργιος →Every word from Russian Серге́й →
Serguei — Etymology, Origin & Word History | Etymology Explorer