Hamza mentions that name. The prose introduction to Ferdausi says that
the "Book of Kings" was written first of all at the instance of Khushrau
I Anoshirwan, but that the complete story was compiled only under
Yazdegerd III by the Dihkan Danishwar. This work which it would not be
too bold to identify with the _Koday Nameh_ began with the primeval
king, Gayomarth, and reached down to the termination of the reign of
Khushrau II, surnamed Parwez. Although this introduction to Ferdausi
dates but from the fifteenth century, and as for details is disfigured
by inaccuracies and fictions, I attach weight to what it indicates
respecting the time of its composition. In fact the concord of the
narrative in the various sources reaches down to the death of Parwez and
then abruptly ceases; while there are no vestiges to demonstrate that
the completion of the original work was brought about subsequent to the
victory of the Arabs. And the legitimistic nature of the story Is
especially in keeping with the times when usurpation and insurrections
of all sorts had run their course, and when the people looked forward
with, the inauguration of the rule of the youthful grandson, of Parwez,
who was crowned at the sacred place where the dynasty took its rise, to
an era of prosperity to the ancient monarchy,--a hope which was
fearfully crushed with the loss of the battle of Kadisiya towards the
close of 637. Again the replies made by the imprisoned king which have
been reproduced in different sources suit the times of the Yezegerd who
descended from Khusrau II and not Sheroe, Khusrau's brilliant career
despite its shady side strongly contrasted with the period ushered in by
the patricide. A small piece of writing which depicts the first stormy
years of Khusrau's domination in a romantic fashion seems to have arisen
about the same time.

I am less certain about the name Danishwar. It was probably an adjective