Nath siddha
According to David White,
[S]iddha means 'realized, perfected one', a term generally applied to a practitioner (sādhaka, sadhu) who has, through his practice (sadhana), realized his dual goal of superhuman powers (siddhis, 'realizations', 'perfections') and bodily immortality (jivanmukti).
Archeological evidence suggests that in some contexts and regions, yogis of the Nath Siddha tradition were respected and recognized in India. For example, inscriptions suggest a general of the Yadava king Ramacandra donated a village to a yogi in 13th-century. Near Mangalore, that later became a hub of Nath yogis, a monastery and temple was dedicated to yogis in the 10th century.
David Lorenzen states that the Nath yogis have been very popular with the rural population in South Asia, with medieval era "tales and stories about Nath yogis such as Gorakhnath, Matsyendra, Jalandhar, Gopichand, Bharthari, Kanhapa and Chaurangi" continuing to be remembered in contemporary times, in the Deccan, western and northern states of India and in Nepal.
In some contexts, adds White, the term yogi has also been a pejorative term used in medieval India for a Nath siddha, particularly on the part of India's social, cultural and religious elites. The term siddha has become a broad sectarian appellation, applying to Saiva-devotees in the Deccan (Maheśvara siddhas), alchemists in Tamil Nadu (siddhars or sittars), a group of early Buddhist tantrikas from Bengal (mahasiddhas, siddhacaryas), the alchemists of medieval India (rasa siddha), and a mainly north Indian group known as the Nath siddhas. The Nath siddhas are the only still existing representatives of the medieval Tantric tradition, which had disappeared due to its excesses. While the Nath siddhas enjoyed persistent popular success, they attracted the scorn of the elite classes.
According to White, the term yogi, has "for at least eight hundred years, been an all-purpose term employed to designate those Saiva specialists whom orthodox Hindus have considered suspect, heterodox, and even heretical in their doctrine and practice". The yoga as practiced by these Yogis, states White, is more closely identified in the eyes of those critics with black magic, sorcery and sexual perversions than with yoga in the conventional sense of the word.
The Nath Yogis were targets of Islamic persecution in the Mughal Empire. The texts of Yogi traditions from this period, state Shail Mayaram, refer to oppressions by Mughal officials such as governor. The Mughal documents confirm the existence of Nath Yogis in each pargana (household neighborhoods), and their persecution wherein Nath Yogis were beheaded by Aurangzeb.
According to David Lorenzen, the religious groups in Hinduism that militarized and took up arms following the Muslim conquest of India, to resist persecution, appeared among the Nath or Kanphata yogis, often called simply yogis or jogis.
The warrior ascetics were institutionalized as a religious order by Gorakhnath and were expanding in the 13th century, after the establishment of the first Islamic Sultanate in India. They interacted and cooperated with fakirs of Sufi Muslims. The yogis feature prominently in Delhi Sultanate and Mughal Empire period official documents, states David White, both in terms of impressing the ruling elite in the Muslim administration and awards of receiving land grants in some cases such as by Akbar, as well as those yogis who targeted the elite merchants and disrupted the business of administrative Islamic elites in urban areas. In other cases, yogis from the Shaivism, Vaishnavism and Shaktism traditions of Hinduism marshaled armed resistance against the Mughal and British colonial armies.
The history of Nath yogis has been diverse, such as in the 11th and 12th centuries, when Buddhists in South India converted to Nath siddha traditions and helped establish Shiva Hindu temples and monasteries.