The Isfendiyarids or Isfendiyarid dynasty (Modern Turkish: İsfendiyaroğulları, İsfendiyaroğulları Beyliği), also known as the Beylik of Sinop, Beylik of Isfendiyar (İsfendiyar Beyliği), Jandarids or Beylik of Jandar (Candaroğulları, Candaroğulları Beyliği), was an Anatolian Turkoman beylik that ruled principally in the regions corresponding to present-day Kastamonu and Sinop provinces of Turkey, also covering parts of Zonguldak, Bartın, Karabük, Samsun, Bolu, Ankara and Çankırı provinces, between 1292 and 1461, in the Black Sea region of modern-day Turkey. The region is also known in Western literature as Paphlagonia, a name used for the same geographic area during the Roman period. The founder of the beylik was Şemseddin Yaman Candar (also known as Temür Yaman Jandar); the beylik collapsed in 1461 when the Ottoman sultan Mehmed II annexed the region. History The Seljuq Sultan Masud II gave Kastamonu to Temür Yaman Jandar, a commander from the sultan's candar corps, in thanks for rescuing him from Mongol captivity. This province, however, was already under the control of the Chobanids. Following Temür's death, his son Süleyman I conquered the province and annexed Safranbolu and Sinop, formerly ruled by the descendants of Mu‘in al-Din Suleyman. Süleyman then appointed his son Ibrahim I as governor to Sinop and a second son Ali to Safranbolu. Süleyman reigned under the authority of the Ilkhanate, the Mongols of Persia, until the death of the ruler Abu Sa'id. Following the death of Süleyman I, his sons Ibrahim I and Ali fought for the throne. In 1339 Ibrahim was victorious and took over the rule of Kastamonu. Upon his death, his cousin Adil replaced him (1346–1361). When Adil died, his son Kötürüm Bayezid became bey. Bayezid fought twice with Kadi Burhan al-Din, the ruler of the Sivas region, and in 1383 lost Kastamonu to one of his own sons, Süleyman II, who received military support from the Ottoman sultan Murad I. Bayezid left for Sinop, and thus the Jandarid Principality was divided. After Bayezid's death in 1385, his son Isfendiyar succeeded him. Based in Kastamonu, Süleyman II remained faithful to Murad I, his supporter in his revolt against his father, and participated in Ottoman campaigns in Europe in 1386 and 1389. Murad's successor, the aggressive Beyazid I launched an assault in 1391 on Kastamonu as part of an effort to control the Anatolian beyliks. Süleyman II was killed and Jandarids' rule in Kastamonu ended. Meanwhile, fearing conflict with the powerful Ottomans, Isfendiyar requested