Where does “naappojain” come from?

naappojain (Ingrian) comes from Ingrian -iain, from Ingrian -in, from Proto-Finno-Ugric *-in, from Proto-Uralic -ma.

Ancestry of “naappojain”, step by step

StepLanguageWordMeaning
1Ingrian-iainUsed to form nouns, especially names of insects
2Ingrian-inForms adjectives indicating the material of which something is made; -en
3Proto-Finno-Ugric*-in—
4Proto-Uralic-ma—
Every word from Proto-Uralic -ma →Every word from Ingrian -in →Every word from Ingrian -iain →