Thaphabaoth

Thaphabaoth - Drawing on Ophitic sources, Origen, in his Contra Celsum, lists Thaphabaoth, along with Michael and Gabriel, as an angel (or demon) hostile to man.  In gnostic lore, Thaphabaoth is an archontic demon, one of 7 rulers of the lower realms.  When invoked, he manifests in the form of a bear.  Thaphabaoth is the Hebraized form of the Greek Tartarus. [Rf. Thorndike, The History of Magic and Experimental Sciences; Grant, Gnosticism and Early Christianity; Mead, Thrice-Greatest Hermes I, 294.]  (a)

Resource List - all entries are taken verbatim from the original source:

(a) "The Dictionary of Angels" by Gustav Davidson, © 1967