Where does “Μάρτιος” come from?

Μάρτιος (Koine Greek) comes from Latin Mārtius, from Latin -ius, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “Μάρτιος”, step by step

StepLanguageWordMeaning
1LatinMārtiusof or belonging to Mars, the god of war; sacred to Mars
2Latin-iusforming adjectives from nouns; nominative neuter...
3Proto-Italic-jōsForms comparative adjectives
4Proto-Indo-European-yósCreates adjectives from noun or verb stems

Words derived from “Μάρτιος

Every word from Proto-Indo-European -yósEvery word from Latin -iusEvery word from Latin Mārtius