Where does “Atratinus” come from?

Atratinus (Latin) comes from Latin -īnus, from Proto-Italic -īnos, from Proto-Indo-European -iHnos, from Proto-Indo-European -no- — adjectival suffix.

Ancestry of “Atratinus”, step by step

StepLanguageWordMeaning
1Latin-īnusof or pertaining to; -ine
2Proto-Italic-īnosof/belonging to
3Proto-Indo-European-iHnosCreates adjectives of materials
4Proto-Indo-European-no-adjectival suffix
Every word from Proto-Indo-European -no- →Every word from Latin -īnus →Every word from Proto-Italic -īnos →