The Goetia

Goetia, or Liber Malorum Spirituum seu Goetia, dealing with 72+ demons

Goetia is the arts of summoning and exercising control over demonic entities, based on their "Offices". Each of the demons has its sigil, and an angel who operates with them.

The goetia is a component of the grimoire known as "The Lesser Key of Salomon" (Lemegeton).

☝🏽 "Goetia" finds its roots in the ancient Greek term "goēs," signifying "magician.

Two references to the 72 demons from Ars Goetia: here and here.