Glasya-Labolas (Demon)

The demon Glasya-Labolas appears in the grimoires The Discoverie of Witchcraft, Pseudomonarchia Daemonum, The Book of the Office of Spirits, The Lesser Key of Solomon, The Book of Oberon, and Dictionnaire Infernal

From The Lesser Key of Solomon, Crowley/Mathers edition:

Glasya-Labolas

The Twenty-fifth Spirit is Glasya-Labolas. He is a Mighty President and Earl, and showeth himself in the form of a Dog with Wings like a Gryphon. He teacheth all Arts and Sciences in an instant, and is an Author of Bloodshed and Manslaughter. He teacheth all things Past, and to Come. If desired he causeth the love both of Friends and of Foes. He can make a Man to go Invisible. And he hath under his command 36 Legions of Spirits. His Seal is this, to be, etc.

Timeline of related events

1600

1700

1800

1818

Publication of Dictionnaire Infernal (lists this demon)