Tacettinoğulları

The Tacettinoğulları, or Beylik of Taceddin, was a Turkmen principality of northern Anatolia among the Beyliks of Canik. Its founder Taceddin established himself at Niksar in the mid-fourteenth century as Seljuk and Ilkhanid authority faded.

In 1378 he married Eudokia, daughter of the Trapezuntine emperor Alexios III; he fell in battle near Ordu in 1386. His son Mahmud accepted Kadı Burhaneddin's overlordship while secretly favoring Bayezid I, and after 1398 submitted to the Ottomans.

Mahmud kept his lands through Timur's invasion of 1402 and the Ottoman Interregnum, but backing the rebel Küçük Mustafa cost him his life in 1423, when his own soldiers killed him. His two sons held on around Samsun and Çarşamba for a few years until the beylik was absorbed by the Ottomans around 1428.