The International Nath Order was founded by Shri Gurudev Mahendranath in order to share his own spiritual development and magick power with other sincere people in the West. As a sadhu, bhikkhu, and sannyasin, Shri Mahendranath received many initiations during his years of travel in India and Asia. Among these traditions, Shri Gurudev's greatest personal interests have been with the Adi-Nath and Uttara Kaula sects. It was Shri Mahendranath's stated belief that he was the final Guru and Sannyasi member of both these sects.Also of importance: The Scrolls of Mahendranath
As Guru of these ancient sects, Shri Mahendranath resolved not to pass on the Hindu Sannyasi initiation into these sects. He made no new Indian sadhus. This decision was made in response to changes in Indian socio-religious patterns and the difficulty experienced by sadhus of Tantric traditions to be welcomed and supported outside of areas where they were well known and loved. The spiritual pattern of sadhu or sannyasi life and its support by a broad public is foreign to the social structures of the West and most other countries of the World.
To meet this situation, and to give occult spiritual pursuits greater expression in Western lands, Shri Gurudev put into motion the formation of the International Nath Order. The Guru tradition and initiation which he has passed on includes not only wisdom teachings from Hindu, Bhutanese, and Soto Zen sources, but also includes gems of Taoism, and such wisdom as is rediscovered by the science and yoga of meditation and contemplation.
thanks for the tip Adityanath