He is mentioned in a recently discovered inscription in Kharoshthi on a Buddhist reliquary (the "Rukhana reliquary", published by Salomon in 2005), which gives a relationship between several eras of the period, and especially gives confirmation of a Yavana era in relation to the Azes era. He was the son of king Vijayamitra.
In the twenty-seventh year in the reign of Lord Vijayamitra, the King of the Apraca; in the seventy-third year which is called "of Azes", in the two hundred and first year of the Yonas (Greeks), on the eighth day of the month of Sravana; on this day was established [this] stupa by Rukhana, the wife of the King of Apraca, [and] by Vijayamitra, the king of Apraca, [and] by Indravarma (Indravasu?), the commander (stratega), [together] with their wives and sons.[2][3]
Prince Indravarma, son of Commander Vispavarma, together with his wife establishes these bodily relics in his own stupa. Commander Vispavarma and Sisirena, the wife of the Commander, are (hereby) honored. Indravasu, king of Apraca, and his wife Vasumitra, who is the mother of a living son, are (hereby) honored"
^Richard Salomon, An Inscribed Silver Buddhist Reliquary of the Time of King Kharaosta and Prince Indravarman, Journal of the American Oriental Society, Vol. 116, No. 3 (Jul. - Sep., 1996), pp. 418-452
^"Afghanistan, carrefour en l'Est et l'Ouest" p.373. Also Senior 2003
^The World's Writing Systems, Peter T. Daniels, William Bright, Oxford University Press, 1996, p.382 [2]
References
Baums, Stefan. 2012. “Catalog and Revised Texts and Translations of Gandharan Reliquary Inscriptions.” In: David Jongeward, Elizabeth Errington, Richard Salomon and Stefan Baums, Gandharan Buddhist Reliquaries, p. 212–213, 233–234, Seattle: Early Buddhist Manuscripts Project (Gandharan Studies, Volume 1).
^An Inscribed Silver Buddhist Reliquary of the Time of King Kharaosta and Prince Indravarman, Richard Salomon, Journal of the American Oriental Society, Vol. 116, No. 3 (Jul. - Sep., 1996), pp. 442 [3]
^A Kharosthī Reliquary Inscription of the Time of the Apraca Prince Visnuvarma, by Richard Salomon, South Asian Studies 11 1995, Pages 27-32, Published online: 09 Aug 2010 [4]
