In demonology, Camio is a Great President of Hell.
Also called Caim, Caym.
Camio is considered as a Gaelic rendering of biblical 'Cain', who appears in a variation of the fantastical pedigree of Dardanus that is spun out in Lebor Bretnach, the Middle Irish language recension of the compilation called Historia Brittonum (known in the 9th century version by Nennius). Some demonologists link it to a supposed Latin word 'Chamos', 'Chamus', said to be a name given to Baal Peor, and possibly corrupted from Hebrew 'Chium', an epithet given to several Assyrian and Babylonian gods. Epigraphy does not confirm this etymology. It could also be the demonization of a protective spirit (Mabinogi) in pre-Christian Celtic culture of Wales, Scotland and Ireland. In Wales, Caim became and continues to be to this day a commonplace first name for males which means "amddiffynydd" (Welsh for protector)
Camio appears in Ars Goetia, the first part of Lesser Key of Solomon as a Great President of Hell, ruling over thirty legions of demons.
Camio appears in the form of the black bird called a thrush, but soon he changes his shape into a man that has a sharp sword in his hand. When answering questions he seems to stand on burning ashes or coals. Other authors consider Camio a 'Prince' of Hell instead and depict him as a man wearing rich and elegant clothes, and the head and wings of a blackbird.
He is a good disputer and grants the magician the power of eloquent verbal debate and persuasive argument. Camio also gives men the understanding of the voices of birds, bullocks, dogs, and other creatures, and of the noise of the waters too, and gives true answers concerning things to come.
Once with the order of angels, and currently, high president of hell, Caym commands 30 legions. He appears in the form of a blackbird, a main coifed with a headdress & adorned with a peacock tail, or human carrying a tapering sword, & responds from the midst of a burning brazier. It is said that Caym is the most wise occupant of hell, and that he could outwit even the most seasoned logician. It was with him that Luther had his famous dispute from which he spared us the details. Caym teaches communication with animals and waves and knows of the future. Dictionnaire Infernal - Collin de Plancy (1863)
Caim is a great president, taking the forme of a thrush, but when he putteth on man's shape, he answereth in burning ashes, carrieng in his hand a most sharpe swoord, he maketh the best disputers, he giveth men the understanding of all birds, of the lowing of bullocks, and barking of dogs, and also of the sound and noise of waters, he answereth best of things to come, he was of the order of angels, and ruleth thirtie legions of divels. Pseudomonarchia daemonum - Johann Wier (1583)
The Fifty-third Spirit is Camio, or Caim. He is a Great President, and appeareth in the Form of the Bird called a Thrush at first, but afterwards he putteth on the Shape of a Man carrying in his Hand a Sharp Sword. He seemeth to answer in Burning Ashes, or in Coals of Fire. He is a Good Disputer. His Office is to give unto Men the Understanding of all Birds, Lowing of Bullocks, Barking of Dogs, and other Creatures; and also of the Voice of the Waters. He giveth True Answers of Things to Come. He was of the Order of Angels, but now ruleth over 30 Legions of Spirits Infernal. His Seal is this, which wear thou, etc. Goetia - S. L. MacGregor Mathers (1904)