Warning Post contains Spoilers for 6.0 and 6.01.

All Ascians that are part of the convocation have Greek Mythical Character Names.
They're Either a Greek God/Goddess or a Greek Titan. You can learn a lot about each of the members of the convocation based on their abilities or based on their personal relations in the game. That said, here are the known ascians, and their true names.

CONVOCATION OF XIV
#1: Mitron: Specialist in the Aetheric Field of Aquatic Life
True Name: Artemis (as revealed in the Eden Raids)

#2: Loghrif: Specialist in the field of Aetheric Terrestrial Life and Husbandry
True Name: Gaia (as revealed in the Eden Raids)

#3: Halmarut: Specialist in Aetheric Fungal and Plant Life.
True Name: Demeter (Unconfirmed)
Reasoning: Demeter is the goddess of fertility, agriculture, and the harvest.

#4: Emmerololth: Specialist in Aetheric Medicine and Healing
True Name: Asclepius (Unconfirmed)
Reasoning: Asclepius is the greek god of medicine. The child of Apollo and the nymph Coronis.

#5: Lahabrea: Specialist in Aetheric Creation Magicks.
True Name: Haphaestus (Unconfirmed)
Reasoning: Ericthonious is a Greek King, who was adopted and raised by Athena. In the 6.01 Raids, Pandaemonium, it's revealed that Lahabrea is Ericthonious' Father, and Athena is his Mother. In Greek Mythology, Athena was married to Haphaestus.

#6: Altima: Advocator for the Arts
True Name: Apollo (Unconfirmed)
Reasoning: Apollo is the Greek god of music, poetry, art, oracles, archery, plague, medicine, sun, light, and, knowledge.

#7: Igeyorhm: Champion of Enlightenment and Rhetoric
True Name: Peitho (unconfirmed)
Reasoning: Peitho is the goddess who personifies persuasion and seduction. Her Roman Equivalent, Suada or Suadela. She is the goddess of charming speech.

#8: Pashtarot: Preserver of Discipline and Order
True Name: Eunomia (Unconfirmed)
Reasoning: Eunomia is the Goddess of Law and Legislation.

#9: Emet-Selch: Keeper of the Aetherial Realm or "Underworld" in the vernacular
True Name: Hades (revealed in Shadowbringers MSQ)

#10: Fandaniel: Pursuer of Extant Phenomena
True Name: Hermes (Revealed in Endwalkers MSQ)

#11: Deudalaphon (Study of Research unknown)
True Name: Unknown

#12: Nabriales: (Study of Research Unknown)
True Name: Kronos
Reasoning: Kronos is the only God/Titan that controls time in all of greek mythology. If you watch the conversation between Minfillia and Nabriales in the Chrysalis, she is shocked to know that he controls time itself, as he puts the player in a pocket time loop of meteors falling forever.

#13: Elidibus: Mediator of Conflict and Surveyor of the People
True Name: Themis (Unconfirmed)
Reasoning: #1 In Game they share the same voice actor. #2: Themis is personification of justice, goddess of wisdom and good council and interpreter of the gods' will.

#14: Azem: Traveler of the World & Counselor of the People
True Name: Unconfirmed