Before going into detail, here a summary of Elder names:

Golden Wasteland Elder: Tsadi

Vault of Knowledge Elder: Lamed

Eye of Eden Elder: Alef/Resh

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1. Isle/Daleth

The name was mentioned in the Tom Zhao concepts, linked on the final page of this document. Avian themes are characteristic of the Isle Elder.

(Daleth concept art from Tom Zhao's website)

Above is the a social media release for the Isle elder. The name reads "Daleth," and his related terms are "dawn" and "ferry post," referring to the characteristics of his realm. This confirms the connection between the name and the character.

Daleth (pronounced 'da-let') is the fourth letter in the Hebrew alphabet. While the specific root of this name is not known, it is commonly accepted that the preceding, ancient letter that lead to 'Daleth' looked like a door. Similarly, the Hebrew word for 'door' is "Delet.' Perhaps this is referenced as Daleth is the Elder who welcomes you into the Kingdom of Sky; actively functioning as the door to the kingdom.

In a spiritual sense, 'Daleth' is said to represent humility. Another source expresses that Daleth represents the choice to open oneself to hope or remain closed off. A Tom Zhao concept aligns with this sense.

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2. Prairie/Ayin

Concepts for the Prairie Elder, given in a social media release by TGC.

Ayin (pronounced 'ah-yeen') is the sixteenth letter of the Hebrew alphabet. It is derived from the Hebrew word for eye, and is recognised to symbolise sight, both physical and spiritual.

When applied to a person, the source expresses that "Someone who has the letter ע in their name is a big-hearted person with a constant desire to help others. They are people without an ego, and all they want is to see that things are good and go well for others."

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3. Forest/Teth

The simplest and most straightforward name match. A majority of the fandom correctly guess this as the Hidden Forest Elder's name.

Their name was also present in this concept:

Teth (pronounced 'tate', but the fandom says teth) is the ninth letter of the Hebrew alphabet. Perhaps this is reflected in the number of tied hair segments she has (four on the front, five on the back). It also had developed from the pictogram of a 'spinning wheel;' a large one was inside her temple in the older versions of Sky.

There is a sense of duality associated with this letter; although it is the first letter in the Hebrew word for 'purity' (used to describe the creation of light in Judaism and the separation of light and darkness) , it is also the first letter for the word 'impurity'.

This may be reflected in the production of dark stone in the Hidden forest, in which she applies light to dark stone. Aside from the main source used for these analyses, another source expresses that 'Teth' also represents a serpent

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5. Valley Twins/Samekh

There is only one name given to the two twins, because a TGC release at CAFA GAME ART (2018) stated that there was only supposed to be one elder for the Valley of Triumph: a priestess

A translation of the text reads: Perfection, romantic, optimism, eternity Descendants fly with light creatures on the summit, practice their flying skills. Light creatures leave them when they arrive in the arena. Descendants summon and challenge an ancient(priestess). She tells them the lighthouse is just beyond the clouds. Descendants then start flying down the mountain towards a mysterious castle, but suddenly lose control of flight

The name "Samekh" was used to label the twins in this concept too:

Samekh (pronounced 'sah-meck') is the fifteenth letter of the Hebrew alphabet. In a literal sense, it means 'support.' Its essence expresses something circular; something with no beginning and no end. It also often represents a fortified wall, which protects/ allows for a sense of security. This circular theme is present throughout the Valley; in the ice rink, the globe rings and structure shape of the Citadel, and in the old Valley Elder cutscene.