Koyunbaba (or Seyit Ali) was a saint who lived in the city of Osmancık in Çorum Province, Turkey, in the 15th century. Koyunbaba (whose epithet means "sheep father") was a shepherd in Bursa in northwestern Turkey. The guitar suite Koyunbaba by Carlo Domeniconi was named after this saint. See also Koyunbaba Bridge, a historic arch bridge in Osmancık, Çorum Osmancık