Where does “Martỹo” come from?

Martỹo (Old Portuguese) comes from Latin Martinus, from Latin -inus, from Proto-Italic -īnos, from Proto-Indo-European -iHnos, from Proto-Indo-European -no- — adjectival suffix.

Ancestry of “Martỹo”, step by step

StepLanguageWordMeaning
1LatinMartinusof or like Mars” or “little Mars; of or like...
2Latin-inusOf or pertaining to; -ine
3Proto-Italic-īnosof/belonging to
4Proto-Indo-European-iHnosCreates adjectives of materials
5Proto-Indo-European-no-adjectival suffix
Every word from Proto-Indo-European -no- →Every word from Latin -inus →Every word from Proto-Italic -īnos →