Where does “eroitos” come from?

eroitos (Ingrian) comes from Ingrian eroittaa, from Ingrian ero — difference.

Ancestry of “eroitos”, step by step

StepLanguageWordMeaning
1Ingrianeroittaato separate
2Ingrianerodifference
Every word from Ingrian ero →Every word from Ingrian eroittaa →