Table 13 a While it is true that in the Ottoman textual culture the names Sinan and Yusuf were often used interchangeably for individuals named as Sinan al-Din Yusuf, it is more likely that these Sinan and Yusuf b. ‘Umar al-Sa‘ati are two different individuals, maybe even brothers as the sons of a certain ‘Umar who is referred to in the register sometimes as muwaqqit, sometimes as mwaddin, and sometimes as munaggim. For example, in the relevant entries from the month of du |-higga in the year 916/March 151, Sinan’s name is recorded as the one given 500 aspers on the 25th of that month for the taqwim he presented whereas Yusuf apparently received his customary 500 aspers on the 29th.