From Wikipedia:
Turkic Mythology is the body of myths and teachings that belong to the Turkic people. Turkic mythology embraces Tengriist and Shamanist traditions as well as all cultural and social subjects being a nomad folk. Later, specially after Turkic migration some of the myths were decorated with Islamic symbols. It has many common points with Aegean and Anatolian mythologies (Green and Hittite) as well as Mongol mythology. Turkic mythology was influenced by other local mythologies. For example, in Tatar mythology elements of Finnic and Indo-European myth co-exist. Subjects from Tatar mythology include Äbädä, Şüräle, Şekä, Pitsen, Tulpar, and Zilant. Besides Buddhism, Zoroastrianism and Manichaeism still carry signs from Turkic mythology.
Irk Bitig, a 10th-century manuscript found in Dunhuang is one of the most important sources for Turkic mythology and religion. This book is written in Old Turkic alphabet like the Orkhon inscriptions.
The 10th-century Irk Bitig or “Book of Divination” of Dunhuang is an important source for early Turkic mythology
As a result of the nomad culture, the Horse is also one of the main figures of Turkic mythology; Turks considered the horse an extension of the individual -though generally dedicated to the male- and see that one is complete with it. This might have led to or sourced from the term “At-Beyi” (Horse-Lord).
Umay is the goddess of fertility and virginity.
JAPANESE MYTHOLOGY & FOLKLORE 