Fersaf, formerly Dereyamaç, is a village in the Tillo District of Siirt Province in Turkey. It is 7 kilometers from the town of Tillo.
The village is populated by Arabic-speaking Arabs. It has a population of 239 (2025).
The population of the area has been decreasing rapidly.
Historic population figures of the village:
In a government list of 1928, the village is listed as Fersaf or ÃÂñóçÃÂ. However, in a government list of 1968, the village is listed as Dereyamaç (literally "creek slope"; Turkish: ' + '). In 2014, the name was changed back to Fersaf.
The village name also appears as Firsaf, Firsâf, or FÃÂrsêf in some records.
The village dialect of Arabic differs from Modern Standard Arabic and from other local dialects of Arabic. One of the main differences is the prevalence of imÃÂla, the fronting and raising of vowel sounds, probably influenced by local Kurdish dialects.
Distinctive Arabic vocabulary of the village includes (in Turkish transliteration)
According to legend, 7th-century Arab commander Khalid ibn al-Walid pitched his tent north of what is now Fersaf while attacking Siirt.
The Firsafî family of Qadiri sheikhs is said to have settled around Siirt and Hazro after fleeing the Mongol invasions. Sheikh à Âeref of the family settled in Fersef.
In 1844, Sheikh Muhammed al-Fersafi (Sheikh al-Hazin) opened a madrasa in the village which was active until at least 1903.