Where does “-ᛁᚾᚨ-” come from?

-ᛁᚾᚨ- (Proto-Norse) comes from Proto-Germanic -īnaz, from Proto-Indo-European -iHnos, from Proto-Indo-European -no- — adjectival suffix.

Ancestry of “-ᛁᚾᚨ-”, step by step

StepLanguageWordMeaning
1Proto-Germanic-īnaz-en
2Proto-Indo-European-iHnosCreates adjectives of materials
3Proto-Indo-European-no-adjectival suffix
Every word from Proto-Indo-European -no- →Every word from Proto-Germanic -īnaz →Every word from Proto-Indo-European -iHnos →