https://www.quora.com/Are-Brahmins-Aryans
Before being Aryans, Brahmins were basically Abrahamics.
How they are Aryans?
Basically Aryans were Mesopotamians.
How Mesopotamians became Aryans?
Initially they became Abrahamics, by following the Abraham. The famous man who created the religion Monotheism (Adwaitha).
Hence Aryan were Abrahamics when they were in Mesopotamia
.Because of the clash between Abrahmics and polytheists of Mesopotamia the Abrahamics had to quit Mesopotamia
Some of the Abrahamics settled in Iran and entered India around 5000 years ago.
Because the Abrahamics entered India from Iran the Abrahamics were wrongly identified by Indians as Iranians. Gradually the name Iranians became Aryans and Iyya. For example Ayyappa deformed form of Aryappa and Iraniyappa.
The Ayya and Arya became respectful suffix or affix because Aryans grades themselves as I st grade citizens of India during their regime called Aryavarta.
Aryans are cunning, selfish, and greedy fellows.
Therefore they created their own religion in India that is Vaishnavism to counter the existing religion Shaivism of India.
Abrahamics became Jews, Germanic Saxans, Yahudis, and some of them entered Iran and hence became Iranians, Moses sect, etc.
When Abrahamic Iranians entered India they became Aryans.
Note: The name of the god of Brahmins is Brahma and their caste Brahman are derived from the name Abraham.