Ilda Baoth. Lit., “the child from the Egg”, a Gnostic term. He is the creator of our physical globe (the earth) according to the Gnostic teaching in the Codex Nazaræus (the Evangel of the Nazarenes and the Ebionites). The latter identifies him with Jehovah the God of the Jews. Ildabaoth is “the Son of Darkness” in a bad sense and the father of the six terrestrial “ Stellar”, dark spirits, the antithesis of the bright Stellar spirits. Their respective abodes are the seven spheres, the upper of which begins in the “middle space”, the region of their mother Sophia Achamôth, and the lower ending on this earth—the seventh region (See Isis Unveiled, Vol. II., 183.) Ilda-Baoth is the genius of Saturn, the planet; or rather the evil spirit of its ruler.
Source: H.P.Blavatsky - The Theosophical Glossary