Marquis, 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 — silver 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 65
“The Sixty-fifth Spirit is Andrealphus. He is a Mighty Marquis, appearing at first in the form of a Peacock, with great Noises. But after a time he putteth on Human shape. He can teach Geometry perfectly. He maketh Men very subtle therein; and in all Things pertaining unto Mensuration or Astronomy. He can transform a Man into the Likeness of a Bird. He governeth 30 Legions of Infernal Spirits, and 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.