Godhead (Judaism) – In Judaism, the term "Godhead" is sometimes used to refer to the unknowable aspect of God which lies beyond His actions or emanations (as it were).
Godhead (Christianity) - In Christianity, the divinity of Trinity is sometimes referred to as the "Godhead". In some nontrinitarian sects, several divine beings are referred to collectively as "the Godhead."
Binitarianism - the belief that the Godhead is composed of two separate beings, Father and the Son, while the Holy Spirit is the power of God and not a separate being.