Who is listed as XXX father?
Dmitry of Uglich
Tsarevich Dmitry or Dmitri Ivanovich (Russian: Дмитрий Иванович, tr. Dmitrii Ivanovich; 19 October 1582 -- 15 May 1591), also known as Dmitry of Uglich (Дмитрий Угличский, Uglichskii) or Dmitry of Moscow (Дмитрий Московский, Moskovskii), was a Russian tsarevich famously impersonated by a series of pretenders after the death of his father Ivan the Terrible.