Documented traditional beliefs, sourced from real ethnographic and religious-studies scholarship — not a complete pantheon, and not a claim about what any individual believes today.
In Igbo tradition (Odinani), Chukwu — from chi ("spirit") and ukwu ("great"), "the Great Spirit" — is understood as the supreme creator, the source of all things and the ultimate authority over both the earthly and spiritual worlds. Chukwu is also called Chineke ("the Spirit that creates") and Olisa, names used interchangeably for the same being; many Igbo Christians today use Chukwu or Chineke as the name for the Christian God.
Source: Igbo cosmology. Researched through Wikipedia's articles on Chukwu and Odinala; the Chukwu article's reference list names Chinua Achebe (1975), Austin J. Shelton (1965), M. Angulu Onwuejeogwu (1997) and Edmund O. Egboh (1972). Those works were not consulted directly.