Duke, 30 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 26
“The Twenty-sixth Spirit is Bune (or Bim). He is a Strong, Great and Mighty Duke. He appeareth in the form of a Dragon with three heads, one like a Dog, one like a Gryphon, and one like a Man. He speaketh with a high and comely Voice. He changeth the Place of the Dead, and causeth the Spirits which be under him to gather together upon your Sepulchres. He giveth Riches unto a Man, and maketh him Wise and Eloquent. He giveth true Answers unto Demands. And he governeth 30 Legions of Spirits. His Seal is this, unto the which he oweth Obedience. He hath another Seal (which is the first of these,”...”
Verbatim, cut from the 1904 text by script/extract_goetia.rb. Mathers' spelling and capitalisation are left exactly as printed.