brahmana

Islam
Apart from figures in the Dharmic religions, there are many Brahmins in the religion of Islam, especially those western-Born Indian Brahmin converts to Islam.
The group known as "Hussaini Brahmins" are the disciples of Imam Hussian, grandson of the prophet Mohammad.
A popular saying about the Hussainis has it thus:
But there is also another version of how the Dutts of Punjab came to be known as Hussaini Brahmins. One of the wives of Imam Hussain, the Persian princess Shahr Banu, was the sister of Mehr Banu, the wife of an Indian king called Chandragupta. When it became clear that Yazid was adamant on wiping out the Imam, the Imam's son Ali ibn Hussain rushed off a letter to Chandragupta asking him for help against Yazid. When Chandragupta received the letter, he dispatched a large army to Iraq to assist the Imam. By the time they arrived, however, the Imam had been slain. In the town of Kufa, in present-day Iraq, they met with one Mukhtar Saqaffi, a disciple of the Imam, who arranged for them to stay in a special part of the town, which even today is known by the name of Dair-i-Hindiya or ‘the Indian quarter’.
Some Dutt Brahmins, under the leadership of one Bhurya Dutt, got together with Mukhtar Saqaffi to avenge the death of the Imam. They stayed behind in Kufa, while the rest returned to India. Here they built up a community of their own, calling themselves Hussaini Brahmins, and although they did not convert to Islam they kept alive the memory of their links with Imam Hussain.
The Hussaini Brahmins believe that Krishna had foretold the event of the Imam's death at Karbala in the Gita. According to them, the Kalanki Purana, the last of eighteen Puranas, as well as the Atharva Veda, the fourth Veda, refer to Imam Hussain as the divine incarnation or avatar of the Kali Yug, the present age. They hold Imam Ali, Imam Hussain's father, and son-in-law and cousin of the Prophet Muhammad, in particular reverence, refer-ring to him with the honorific title of Om Murti.
This group applies the tilak on their forehead just like many other Hindus.[46