The Hermetic Brotherhood of Light was a Fraternity that descended from the Frates Lucis in the late 18th century (in turn, derived from the German Order of the Golden and Rosy Cross), and was the seed from which Ordo Templi Orientis was created.
Carl Kellner and Paschal Beverly Randolph were members. In Theodor Reuss' 1917 O.T.O. Constitution, it states in Article 1, Section 1:
- Under the style and title: ANCIENT ORDER OF ORIENTAL TEMPLARS, an organization, formerly known as: "The Hermetic Brotherhood of Light", has been reorganized and reconstituted. This reconstituted association is an international organization, and is hereinafter referred to as the O.T.O.
- Greenfield, Allen. The Story of the Hermetic Brotherhood of Light. Luxor Press
- ____. Hermetic Brotherhood Revisited. Luxor Press
- Godwin, Joscelyn. (1990). "The Brotherhood of Light." Theosophical History, Vol. III, No. 3