Duke, 37 legions
Rank and legion count as the 1904 edition gives them. The legions come from the phrase that closes almost every entry; the rank comes from the book's own appendix, which classifies all seventy-two and states the metal each rank's seal is to be made in — copper for this one. The entries use rank words descriptively as well — Eligos appears 'in the form of a goodly Knight' and Barbatos comes 'with four noble Kings' — so a rank harvested from the prose would invent titles the book does not give. Only the appendix classifies.
Sources (1)
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Lemegeton
, The Goetia: The Lesser Key of Solomon the King
— The Goetia, spirit 47
“The Forty-seventh Spirit Uvall, or Vual, or Voval. He is a Duke, Great, Mighty, and Strong; and appeareth in the Form of a Mighty Dromedary at the first, but after a while at the Command of the ” Or “with the Head of a Lion,” or “having a Lion his Head,” in some Codices. Exorcist he putteth on Human Shape, and speaketh the Egyptian Tongue, but not perfectly.” His Office is to procure the Love of Woman, and to tell Things Past, Present, and to Come. He also procureth Friendship between Friends and Foes. He was of the Order of Potestates or Powers. He governeth 37 Legions of Spirits, and his...”
Verbatim, cut from the 1904 text by script/extract_goetia.rb. Mathers' spelling and capitalisation are left exactly as printed.