The white grape variety comes from Turkey; the name means "Grandfather Dede Beyazi". Synonyms are Ahmet Bey, Aseri, Hasan Dede, Sungurlu. In spite of apparently indicative synonyms or morphological similarities, it should not be confused with the Kalecik Karasi or Sungurlu varieties. According to DNA analyses carried out in 2005, it is identical with the Aseri variety. In addition, a parent-offspring relationship was established with the no longer cultivated Sungurlu variety. There is also a red variety called Hasandede Siyahi, but nothing is known about a possible relationship. The medium ripening vine is resistant to various vine diseases. It produces high alcohol white wines of simple quality, but is mainly used as a table grape and for the production of Pekmes(grape syrup). The variety is cultivated in the Kirikkale province east of Ankara in Central Anatolia. However, no stock was reported in 2010 (Kym Anderson).