ìbejì noun /ì.bē.d͡ʒì/
ùbejìn (alternative), ùbéjì (alternative, Ekiti)
Definitions
  1. twins
Etymology
ì- (“nominalizing prefix”) + bí (“to give birth to”) + èjì (“two”)
Component words
ì-nominalizing prefixto give birth toèjìtwo
Source: Wiktionary, where this word is spelled “ibeji”. Reference: en-ibeji-yo-noun-l1kKhOJX