Given dates (all in the Common Era) are approximate and represent the upper and lower possible extremes of the person's lifetime.
The claim that Īśvarasena was a disciple of Dignāga (Schiefner, ed. 1868, Obermiller 1931/1932) is to be taken only as a claim of the tradition (Frauwallner 1961 p. 141). Teacher of Dharmakīrti. Life dates: ca. 580–640. For the legend of his life cf. Obermiller 1931/1932 II p. 152, Schiefner, ed. 1868 p. 176.