Furfur is a spirit known from Western esoteric demonology, particularly in the Ars Goetia section of the 17th-century grimoire *The Lesser Key of Solomon*. He is classified as a Great Earl of Hell and commands 26 legions of demons.
In his traditional depiction, Furfur initially appears as a hart or winged deer but can be compelled to take human form within a magically constrained triangle. This transformation is required for him to speak truthfully; otherwise, he is known to lie.
Furfur is associated with storms, thunder, lightning, and tempests, which he can cause or cease. He is also said to have a connection to love and relationships—he can create love between individuals and reconcile feuds. Additionally, Furfur is credited with revealing hidden secrets and offering true answers about divine and secret matters when constrained.
In esoteric systems, Furfur embodies wild, chaotic energies harnessed for transformation and insight, particularly through elemental forces and emotionally charged situations. Some occult practitioners view him as a metaphor for mastering inner storms to gain clarity and power.