Dear Jim,

According to the catalogues of the Tibetan canon, the translation was done by Rin-chen-bzang-po (955-1054), and, because he also translated the root text, this seems likely to be correct.

Although Vairocana of Pa-gor seems to have been a real 8th c. individual, it is very difficult to disentangle whatever is factual from the enormous body of legend that grew up around him. Because the Tibetan medical tantra, the Rgyud-bzhi (Four Tantras), is an apocryphon that claims its authority with reference to the period of the 8th c. monarch Khri srong lde'u btsan, it is not surprising that the "historical" tradition that developed around it would have wanted to appropriate other authorities as well.

best,

Matthew

From: INDOLOGY <indology-bounces@list.indology.info> on behalf of James Hartzell via INDOLOGY <indology@list.indology.info>
Sent: Sunday, October 6, 2019 5:57 AM
To: Indology <indology@list.indology.info>
Subject: [INDOLOGY] Date of Candranandana

Does anyone have a definitive date for Candranandana, author of the commentary Amṛtahṛdaya Aśṭāṅga Guhyopadeśatantra on Vāgbhaṭa´s Aṣṭāṅgahṛdaya (or Aṣṭhāṅgasaṃhitā)?  According to the Tibetan medical history tradition, as reported in "The Origin of the rGyud bzhi: A Tibetan Medical Tantra” by Todd Fenner (https://www.thlib.org/encyclopedias/literary/genres/genres-book.php#!book=/studies-in-genres/b27/dn3/), Vairocana studied with him in Kashmir, and translated this text into Tibetan, and presented it to King Trisong Detsen (Tibetan: ཁྲི་སྲོང་ལྡེ་བཙན), who ruled (according to Wikipedia) 755 CE until 797 or 804 CE.