Tetragrammaton means litteraly "Four lettered Word" or "Word of Four Letters". That is Iehovah or IHVH. Any other name of Four letters would be "a" tetragramma, but when it comes to occult and esoteric talk, we're talking 'bout THE tetragrammaton, the IHVH. If you think, Adonay it's written with four letters too, ADNI. Eheieh, AHIH, is four lettered also. Theos is four letters, though "Th" is one letter en Greek. Tetragrammaton is a title used for THE Word of four letters, and that is IHVH.
W.
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