Bethor

Bethor is an Olympian spirit in the Grimoire Arbatel de magia veterum, ruling over Jupiter.

cquote2|The affairs of Jupiter are administered by BETHOR, who responds quickly when called. The person dignified by his character may be exalted to illustrious positions and may obtain large treasures. He reconciles the Spirits of the Air to man, so that they will give true answers, transport precious stones and compose medicines having miraculous effects. BETHOR also grants familiars of the firmament, and can prolong life to seven hundred years, subject to the will of God, which qualification imparts an air of caution.
Arthur Edward Waite| [http://www.sacred-texts.com/grim/bcm/index.htm The Book of Black Magic]