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There appear to be two Jnanasutras, with different Tibetan orthographies for their names.
The first, Wylie: ye shes mdo, flourished from the 5th-6th centuries. According to Dzogchen legends, he was an early Dzogchen practitioner of Vajrayāna Buddhism and a disciple of Sri Singha. This Jnanasutra was a spiritual brother of Vimalamitra, another principal disciple of Sri Singha.
In Jigme Lingpa's terma of the ngöndro of the Longchen Nyingthig he writes what approximates the phonemic Sanskrit of 'Jnanasutra' in Tibetan script as Tibetan: ཛྙཱ་ན་སཱུ་ཏྲ, Wylie: dznyā na sū tra, rather than his name in Tibetan and this comes just after a sentence to Sri Singha and before mentioning Vimalamitra.
- Dharma Dictionary (2008). Jnanasutra (accessed: January 29, 2008)
- Dowman, Keith (undated). Legends of the Dzogchen Masters. Source:  (accessed: January 29, 2008)
- Tarthang Tulku (1980), Guide to the Nyingma Edition of the sDe-dge bKa '-'gyur/bsTan-'gur. Vol. 1, California, USA, 1980
- Rhaldi, Sherab (undated). 'Ye-Shes-sDe; Tibetan Scholar and Saint'. Tibetan & Himalayan Digital Library. Source:  (accessed: Wednesday April 1, 2009)