This represents over twenty pages of angel names, copied from A Dictionary of Angels by Gustav Davidson. This isn't even half of what's in that book, so if you want the full list, read the book. Most of this list is paraphrased from there. The decision for which names to copy down was pretty arbitrary... I tried to get all the important ones, but for the less important ones, I only copied them down if they sounded cool and I thought they would make for good character names. Most of the information contained here comes from apocryphal texts and grimoires. Original sources include, but are not limited to: The Zohar, The Talmud, The Key of Solomon, The Testament of Abraham, the Book of Enoch, The Books of Occult Philosophy, and various other books of extremely obscure Jewish lore and occultism. A lot of the lore is extremely confusing and contradictory, so don't expect it to make sense.
Abalidoth: A celestial luminary of human sexuality.
Abariel: An angel from some systems of ceremonial magic (e.g. The Greater Key of Solomon), used for invoking.
Abasdarhon: Angel of the fifth hour of the night.
Abdia: A protective angel that shields the magician during ceremonial magic. Means "servant."
Abdiel: An angel from the Book of Raziel. Means "servant of God."
Abathur Muzania: The angel of the North Star in Mandaean cosmology. Presides over the scales that weigh the human soul (like in Egyptian mythology).
Abelech (Helech): An angel invoked to command demons.
Abraxas/Abraxis: Greek name referring to some sort of supreme entity or spirit, uncertain etymology. Could mean "shining one." The Prince of Aeons in the Kabbalah, and source of gnosis.
Abriel: A dominion, invoked in Kabbalistic rites.
Achaiah: Means "trouble," one of 8 Kabbalistic Seraphim, the Angel of Patience and "discoverer of the secrets of nature."
Achamoth: A Gnostic angel, probably a name for (or daughter of) Sophia. She was the mother of an evil god.
Acrabiel: Angel of the Zodiac, apparently. From Agrippa's Occult Philosophy.
Adabiel: Listed as one of the seven archangels in one source, an angel of Jupiter. Sometimes equated with Zadkiel or with Nergal.
Adadiyah: A name for Metatron.
Adatiel: An angel of the air from ceremonial magic. Appears in a billowing mantle that's either black and white or blue.
Adirael: Means "magnificence of God."
Adiririon: Angel of "the might of god," whose name was inscribed on protective amulents.
Admael: One of the angels with dominion over the earth.
Adnachiel/Advachiel: Angel of November and Sagittarius.
Adnai/Adnah: An angel of Venus, means "pleasure."
Adnarel: An angel ruling over winter, means "my lord is God."
Adoil: A primordial light of creation (from the Book of Enoch). Means "hand of god."
Adonael (Adonaeth): An angel that can overcome demons of disease.
Adriel: Means "my help is God," an angel of death (who slays all souls left in the last days, apparently). Guards the gate of the South Wind. Probably another name for Azrael.
Adrigon: Another name of Metatron.
Affafniel: An angel of wrath with sixteen faces (four separate faces that each cycle between four aspects).
Afriel: The angel of force, who may be Raphael.
Aftemelouchos: The Angel of Torment, who wields a fiery trident.
Aftiel: The Angel of Twilight.
Agmatia
Agromiel: A guardian of the sixth heaven.
Ahabiel: An angel invoked in love charms.
Ahaniel: An angel whose name is inscribed on amulets that guard children.
Aiel: An angel of the air, of Sunday, and of the sign Aries.
Akatriel (Achtariel): A great angel prince, with the epithet Sabaoth ("lord of hosts"). An Angel of the Presence. Sometimes designated as a manifestation of the Godhead itself.
Akriel: Angel of barrenness.
Akteriel/Akathriel: An angel summoned by Sandalphon to reveal how Samael (or Satan) could be defeated. He was not successful, as even angels cannot defeat evil.
Akraziel: Means "herald of god," the Angel of Proclamation. Reveals divine mysteries. (Maybe Raziel.)
Aladiah: Able to bind the demon Buer.
Alazaion: An angel from the Greater Key of Solomon, invoked in the "conjuration of the Reed."
Albim: An angel that guards the gates of the North Wind.
Alfatha: An angel of the north.
Alimon: A great angel prince who protects from gunshots and sharp objects.
Alimiel (Dumahel): A guardian angel of the Veil around God's throne.
Almiras: In grimoires, the angel of invisibility.
Alphun: The angel of doves.
Alpiel: An angel of fruit trees.
Amabael: An angel of winter.
Amabiel: An angel of Tuesday and of Mars, angel of human sexuality.
Amaliel: The angel of punishment and chastisement, and of weakness.
Amatiel: One of the angels of spring.
Ambriel (Amriel): A Throne, angel of May and of Gemini, and of the 12th hour of the night.
Amitiel: The Angel of Truth.
Anachiel: Angel of Saturn.
Anael (Haniel): An archangel, the ruler of Principalities. Has control over earthly kingdoms and of the moon, and of the planet Venus. Also an angel of human sexuality, and an Angel of the Apocalypse. Rules Capricorn and December. Means "joy of God."
Anafiel/Anaphiel (Aupiel): Keeper of the keys to heaven and the "prince of water." Means "branch of god" or "shield of God."
Anahita: Zoroastrian angel/goddess of water, fertility, and wisdom.