What is the term used for the group of Zygarde/Yveltal/Xerneas?

Question

Zapdos + Moltres + Articuno = The Legendary Birds
Entei + Raikou + Suicune = The Legendary Dogs
Kyogre + Groudon + Rayquaza = The Weather Trio
Latios + Latias = The Lati Twins / Lati@s
Regirock + Regice + Registeel + Regigigas = The Regis / The Regi Trio (- Regigigas)
Dialga + Palkia + Giratina = The Creation Trio
Cobalion + Terrakion + Virizion + Keldeo = The Swords of Justice
Thundurus + Landorus + Tornadus = The Forces of Nature / The Genies / The Kami Trio

What is the official / fanmade term for the trio of Zygarde + Yveltal + Xerneas?

(Bonus: What is the name of Uxie/Mesprit/Azelf I forgot :P)

Comments

They're sometimes called the mortality trio because Xerneas is related to life, Yveltal is related to death, and Zygarde is what maintains a balance between the two.

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lugia + ho-oh: Tower Duo
regirock + regice + registeel (+ regigigas) + regieleki + regidrago: legendary titans
latias + latios: Eon Duo
uxie + mesprit + azelf: Lake trio/Lake Guardians
reshiram + zekrom + kyurem: Tao Trio
Xerneas + Yveltal + Zygarde: Aura Trio
Tapu Koko + Tapu Fini + Tapu Bulu + Tapu Lele = Guardian Deties
Solgeleo + Lunala + Necrozma = Light Trio

Answer 1

The Trio is called the Yggdrasil Trio

composed by, as you know, Xerneas, Yveltal, and Zygarde.

Looking into it, it does make sense and has a deep explanation.

The others you mentioned are called the Lake Trio, probably cause you find them in a lake?
...I dunno I didn't play gen 4 ¯_(ツ)_/¯

Here are the links:
The names
The source

Hope this helps buddy!

Comments

Mesprit, Uxie and Azelf are called the Lake Trio. You were correct.

Answer 2

The Aura Trio couse of there aura ability they use. Xerneas Fairy Aura, Yveltal Dark Aura, Zygarde Aura Break.