Where does “-iō” come from?

-iō (Latin) comes from Proto-West Germanic -jō, from Proto-Indo-European -yéti, from Proto-Indo-European yé-, from Chichewa iye — he, she.

Ancestry of “-iō”, step by step

StepLanguageWordMeaning
1Proto-West Germanic-jōForms agent nouns from verbs
2Proto-Indo-European-yétiCreates intransitive, often deponent,...
3Proto-Indo-Europeanyé-—
4Chichewaiyehe, she

Words derived from “-iō”

Every word from Chichewa iye →Every word from Proto-Indo-European -yéti →Every word from Proto-West Germanic -jō →