Amdusias/ Amduscias
Amduscias, the 67th spirit, is a great duke. His true form is as a unicorn, but appears as human form when summoned.
Amon
Amon, the 70th spirit, can appear in the form of a wolf with a serpent's tail. He vomits flames.
Andras
Andras, the 63rd spirit, is a great Marquis and has the body of an angel and the head of an owl.
Andrealphus
Andrealphus, the 65th spirit, is a Mighty Marquis, first appearing in the form of a noisy Peacock, then in human form.
Andromalius
Andromalius, the 72nd spirit, is an Earl who appears in the form of a man holding a great serpent in his hand.
Anzu
In Sumerian myth, Anzu was a large bird (eagle or vulture) who lived in the realm of the gods.
Asmodeus/Asmoday
Asmodeus, also known as Ashmadia, most likely originated from the Persian Aeshma-deva ("demon of wrath").