A Maskil of Eison the Ezrochi
Rashi says: He was one of the five musician brothers. But our Sages (B.B. 15a) explained it as referring to our father Avrohom, based on (Yishaya. 41:2): “Who aroused from the East (ממזרח )”. Talking about Avrohom as Rashi there says: Who aroused from the East: one whom righteousness accompanied? Who aroused Avrohom to bring him from Aram which is in the East and the righteousness that he would perform that was opposite his feet wherever he went.
Eison the Ezrochi
Meaning strength, meaning old and ancient and more.
Maamor by Frierdiker Rebbe in Name of Alter Rebbe
With regards to the connection between the Divine name ‘Ab’ and ‘Eison’ which is an inner dimension of ‘Chochmah’. The future ascent of the Divine name ‘Ban’ to the Divine name ‘Ab’ will also occur in the deep inner dimension of ‘Eison’. It is because of this future ascent that the Divine name ‘Ban’ (the woman) will be elevated up to become the crown of her husband who at the moment is higher than her and she receives from him.
It: The Divine name ‘Ban’.
Gevuros
Of this world as is understood from the words of the Eitz Chayim, and from the Tanya.
