The ancient Egyptians, whose influence on early religious thought was considered profound, usually arranged their gods and goddesses in groups of three, or trinities: there was the trinity of Osiris, Isis, and Horus, the trinity of Amen, Mut, and Khonsu, and the trinity of Khnum, Satis, and Anukis.
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Plato believed and taught that the Ultimate Reality was a "trinity of divine forms", of the One, Nous, Psyche.
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They differ also from translations of the works of Aristotle by scholars such as Stuart Leggatt, W. K. C. Guthrie, J. L. Stocks, Thomas Taylor and Jules Barthélemy-Saint-Hilaire.
Muslims, Jews, Unitarians and other nontrinitarians claim that the orthodox trinitarian Christian doctrine of the Holy Trinity of Father, Son and Holy Spirit constitutes Tritheism, since these distinct "persons" are unified only by an impersonal substance ousia which does not transcend, or exist apart from, the persons.