http://www.davidmus.dk/en/collections/islamic/dynasties/tulunids-and-fatimids/coins/c255?print=1
...totally disregarding the normal pattern of father-eldest son succession, al-Hakim chose his secondcousin twice removed, an obscure prince named ‘Abd al-Rahim ibn Ilyas ibn Ahmad ibn al-Mahdi, to replace his own son al-Zahir as caliphal heir, as seen on this coin.
...After his death she arranged for the accession of al-Zahir, quietly having ‘Abd al-Rahim removed from the scene.

- Хаким хотел нарушить принятый порядок наследования, выбрав вместо сына некоего тёмного принца.. Примерно то же хотел сделать и Иван III с Дмитрием Внуком, сыном Елены Волошанки.