 With regard to the common denomination of “Ikhwân al-Safâ’,” the old hypothesis by I. Goldziher deserves mention: according to which the name could have been borrowed from the famous collection of fables of indo-persian origin Kalîla wa Dimna to indicate a group of loyal friends. Stern (1964, 421), however, considers the name as a way of hinting at Ismâ‘îliyya. The most convincing hypothesis seems to be that which links the name to the content and goals of the encyclopedia – the salvation of soul through attainment of knowledge and purification of heart (Diwald 1975, 16–22). Recently, Poonawala hypothesized “Ikhwân al-Safâ’” to be a pseudonym hiding the identity of the authors (Poonawala 2015a, 264 and 272).