Nath
The Sanskrit word nāthá नाथ is the proper name of a Hindu initiatory tradition and the word itself literally means "lord, protector, refuge". The related Sanskrit term Adi Natha means first or original Lord, and is therefore a synonym for Shiva, Mahadeva, or Maheshvara, and beyond these supramental concepts, the Supreme Absolute Reality as the basis supporting all aspects and manifestations of consciousness.
The Nath tradition is a heterodox siddha tradition containing many sub-sects. It was founded by Matsyendranath and further developed by Gorakshanath. These two individuals are also revered in Tibetan Buddhism as Mahasiddhas (great adepts) and are credited with great powers and perfected spiritual attainment.
Read more about Nath: Natha Sampradaya, Initiation, Indian Alchemy, The Aims of The Nathas, Sonepur Literature and The Twilight Language