The Magical Name Araritha
“But here the magical name by means of which heaven is sealed is Araritha, and the corresponding name for the earth is ‘EHWY. The latter name, which in the writings of this group frequently serves as an object of mystical speculation, is obviously not a secret name belonging to the theurgic tradition but an artificial product composed of the four consonants employed in Hebrew as matres lectionis.
Abraham ibn Ezra and Yehudah Halevi were the first to propose interpretations of these four letters as the most spiritual elements among the consonants, and hence best suited to form the symbols of the divine spirit in the body of the world and the elements of the two most important divine names in the Torah: ‘Ehyeh and YHWH.
In due course a magical primordial Tetragrammaton was formed, designating the unity of these two names and said to precede them. However, the name Araritha can be found in very old magical texts of the German Hasidim as the secret name of the hashmal in the vision of Ezekiel 1:4.
The same name also appears in a magical piece from the Gaonic period, the “Prayer of Rab Hamnunah the Elder.” In the Book ‘Iyyun, these names are interpreted in the spirit of a Neoplatonic concept of God: they indicate his static as well as his dynamic unity, which also maintains its identity in its oppositions.”
Gershom Scholem, Origins of the Kabbalah, pp. 315-6.