Where does “Aleksis” come from?

Aleksis (Finnish) comes from Finnish Aleksi, from Russian Алексе́й, from Russian Алекси́й, from Ancient Greek Ἀλέξιος, from Ancient Greek -ῐος, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “Aleksis”, step by step

StepLanguageWordMeaning
1FinnishAleksi—
2RussianАлексе́йAlpha (A in the ICAO spelling alphabet)
3RussianАлекси́й—
4Ancient GreekἈλέξιοςhelper, defender
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 Ἀλέξιος →