The Malachim alphabet (from the Hebrew malachim, 'angels' or 'messengers'; also called the 'writing of the kings') is one of three magical alphabets published by Heinrich Cornelius Agrippa in Book III of his Three Books of Occult Philosophy (1533). Adapted from Hebrew and Greek letterforms, its twenty-two letters correspond one-to-one to the Hebrew alphabet, and it was used in Renaissance angel-magic to write the names of angels and to inscribe talismans. This letter is the Malachim form of the Hebrew letter Aleph, whose name means 'ox' and whose gematria value is 1. Its meaning and numerical value are inherited from that Hebrew correspondence; the script is a set of glyph-forms for the Hebrew letters, not an independent alphabet with its own separate symbolism. Malachim, Hebrew for angels or messengers, names the script for its claimed users, not its makers.
Agrippa printed Celestial, Malachim and Passing the River together in Book III of the Three Books of Occult Philosophy, Cologne 1533, without naming a source, and no earlier witness to any of the three survives; historians read them as a Christian kabbalist's own reworking of Hebrew letters, most likely Agrippa's, following Reuchlin's Rhineland work opening Hebrew letter mysticism to Christian scholars a generation before. Occultism today largely sets the three scripts aside as a documented ancient language, treating them as a Renaissance invention. In the Sefer Yetzirah's own threefold division of the alphabet, Aleph is one of the three mother letters, assigned to air, the breath held in balance between Shin's fire and Mem's water.