Prince, 20 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 — tin 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 55
“The Fifty-fifth Spirit is Orobas. He is a great and Mighty Prince, appearing at first like a Horse; but after the command of the Exorcist he putteth on the Image of a Man. His Office is to discover all things Past, Present, and to Come; also to give Dignities, and Prelacies, and the Favour of Friends and of Foes. He giveth True Answers of Divinity, and of the Creation of the World. He is very faithful unto the Exorcist, and will not suffer him to be tempted of any Spirit. He governeth 20 Legions of Spirits. His Seal is this, etc.”
Verbatim, cut from the 1904 text by script/extract_goetia.rb. Mathers' spelling and capitalisation are left exactly as printed.