About Matsyendra

Matsyendra, Matsyendranātha, Macchindranāth or Mīnanātha was a saint and yogi in a number of Buddhist and Hindu traditions. He is traditionally considered the founder of hatha yoga as well as the author of some of its earliest texts. He is also seen as the founder of the natha sampradaya, having received the teachings from Shiva. He is especially associated with kaula shaivism. He is also one of the eighty-four mahasiddhas and considered the guru of Gorakshanath, another important figure in early hatha yoga. He is revered by both Hindus and Buddhists and is sometimes regarded as an incarnation of Avalokiteśvara.
Alakh Niranjan – Alakh Niranjan murmu in Yoga tradition

Alakh Niranjan the foundation of spiritual light

meaning Alakh means A-Lakhshana which means: Beyond identifying features (lakhshana) or attributes It refers to Attributeless or Nirguna in here. This idea comes from traditions originating in Swetashwetara Upanishad. This particular Upanishad deals with Yoga, Vedantic Monotheism as well as as Sat-Chit-Ananda. Legend of Alakh Legend has it, that the slogan or elating cry for the Supreme Being was first coined by Matsyendranath. is popularly regarded as the "second " .