Malachim Resh is drawn as a glyph-form for the Hebrew letter Resh in the Malachim, or writing of the angels, one of three magical scripts Heinrich Cornelius Agrippa published in 1533, rather than a script with independent letter meanings of its own; Resh's own sound and classification, discussed elsewhere in this atlas, belong to the underlying Hebrew tradition.
The Sefer Yetzirah counts Resh among its seven double letters, alongside Beth, Gimel, Daleth, Kaph, Peh and Tav, each traditionally assigned one of the seven classical planets and one of seven paired opposites, though which specific planet and pair belong to which letter is a point on which recensions of the Sefer Yetzirah disagree; Resh is also, unlike those six siblings, excluded from the ordinary Tiberian grammatical rule that actually marks a hard-and-soft distinction with a dagesh, a linguistic mismatch discussed at greater length under the Hebrew letter elsewhere in this atlas.
Agrippa printed Malachim alongside Celestial and Passing the River in Book III of his Three Books of Occult Philosophy, Cologne 1533, without citing a source for any of the three, and no earlier witness to any of them survives; the name Malachim, angels or messengers, and an alternative name recorded for the script, the writing of the kings, both point to the same Renaissance ambition of dressing Hebrew letters in a more overtly angelic or royal guise for use in ceremonial magic. A separate and much later system, the Hermetic Order of the Golden Dawn, mapped Resh onto its own tarot trump and planet along the Kabbalistic Tree of Life, an attribution discussed under the Hebrew letter elsewhere in this atlas and unconnected to this Renaissance glyph in its own right.