Ioannes Tzetzes attributed his commentary on Lykophron to his deceased brother Isaakios Tzetzes. Basileios Achridenos, the patriarchal protonotarios, noticed this and expressed puzzlement. Ioannes replied that out of brotherly love he, like Pheidias, had attributed one of his works to a lesser artist. But neither he nor Pheidias had forgotten their own names (?)