Lord Mamai Dev was born to Lord Matai Dev and his mother’s name is ‘Reenade’. Being the fourth generation of Lord Matang-Dev, he acquired ample knowledge of religious discourses sermonized by Lord Matangdev, Ludangdev and Mataidev. He brought transformation in Barmati Panth by sermonizing Genan in a local language making it understandable to all. He narrated the tenets and precepts of Baarmati-Panth in a more innovative way. He created unique ragas (classical form of singing) conducive to routine time-table and occasion i.e. Noda, Vagat, Umaro, etc. He possessed divinity and uttered more than 9,99,000/- words and forecasted prophesies (Agamwani) in an authentic manner. Most of his prophesies, which rendered due maturity, have materialized. Many of his prophesies are awaiting the events to happen as their time is still not ripe.
He has forecasted the things in a more scientific manner. All Maheshwaris lays supreme belief in the teachings of Lord Mamai Dev with complete faith. He was a visionary religious preacher and realized that after his death, nobody would be able to restrain the sanctitude of the post of Religious teacher. As such, he terminated the hierarchical practice of becoming Religious teacher by birth. Instead, he advocated that after his death, only the ‘Barmati-Panth’ would be regarded as the supreme state of religious affairs. He had six sons namely, Matiyadev, Bhagwant, Lalan, Meghanand, Maade, and Merchant and two daughters namely, Papai and paadhan. He left for heavenly abode and was buried at Makli-Sindh (now in Pakistan).