ẹ̀n intj /ɛ̃̀/
Definitions
  1. Used to answer to one's name.
    Ọ̀jọ̀gbọ́n Afọlábí! — Ẹ̀n? Professor Afolabi! — Yes?
Source: Wiktionary · etymology 1, where this word is spelled “ẹn”. Reference: en-ẹn-yo-intj-OLEtangq