Where does “Marttinen” come from?

Marttinen (Finnish) comes from Finnish Martti, from Russian март, from Old East Slavic мартъ, from Ancient Greek Μάρτιος, from Latin Mārtius, from Latin -ius, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “Marttinen”, step by step

StepLanguageWordMeaning
1FinnishMartti
2RussianмартMarch
3Old East Slavicмартъ
4Ancient GreekΜάρτιοςMarch
5LatinMārtiusof or belonging to Mars, the god of war; sacred to Mars
6Latin-iusforming adjectives from nouns; nominative neuter...
7Proto-Italic-jōsForms comparative adjectives
8Proto-Indo-European-yósCreates adjectives from noun or verb stems
Every word from Proto-Indo-European -yósEvery word from Latin -iusEvery word from Latin Mārtius