The Grand Duchy of Dayeuhluhur was the predecessor to the Cilacap Regency itself.
According to ancient history, in the 1456 book of Kedayeuhluhuran History, the Grand Duchy Dayeuhluhur, was an autonomous province governed by a monarch who Salangkuning located at the palace.
The first king who consolidated is known as Gagak Ngampar or Banyak Ngampar who is the brother of Bayak Cotro from Karanglewas Pasirluhur of the Kingdom, Purwokerto.
Both of them are the sons of the royal Prabu Siliwangi Pajajaran of the Kingdom.
It has a population of around 52,000 people who speak Sundanese and work as farmers.