According to Anna Komnene, Alexios did this to raise Isaac above the rank of Caesar, which he had already promised to his brother-in-law, Nikephoros Melissenos.
Menurut Anna Comnena, Alexius melakukan ini untuk menaikkan Isaakios di atas pangkat Caesar, yang telah dijanjikan kepada saudara iparnya, Nikephoros Melissenos.