This Divine Name is derived from the first letters of the following phrase from the Amidah prayer:
Transliteration:Atah Gibor l'Olam Adonai
Translation:4. Bottom Left:You are mighty throughout eternity Adonai
YHVH transposed according to the Atbash cipher.5. Bottom Border Centre:
Translation:Ehyeh YHVH Adonai, may He send you help from (His) holiness, may He guard you from all evil (Blessed be His Name), may He guard your going forth and coming in.
(more to follow)