From WikiPilipinas: The Hip 'n Free Philippine Encyclopedia
Rajah Bendahara Kalantiaw, otherwise known as Datu Kalantiaw (also spelled as Kalantiao) was one of the mythical characters in Jose E. Marco's Maragtas Legend which he composed for the historical fiction Las antiguas leyendes de la isla de Negros (The Ancient Legends of the Island of Negros). According to the legend, Datu Kalantiaw became the chief of Negros (or Aklan) two hundred years after the rule of Datu Bangkaya, one of the ten datus from Borneo.
According to the Legend of the Ten Bornean Datus, the datus purchased the island of Panay from the Aetas for a golden salakot. After which, they established a confederation of barangays called Katilingban it Madya-as which divided the island into three sakup or provinces, each ruled by a datu – Aklan (ruled by Datu Bangkaya), Iloilo (ruled by Datu Paiburong) and Antique (ruled bu Datu Sumakwel).
Two hundred years later, Datu Kalantiaw arrived at the island and proclaimed himself as the successor of Bangkaya as Chief of Madya-as and its territories. He adopted the title Rajah and established his capital in Batang (now Batan). As the third chief of Panay, he promulgated the Code of Kalantiaw – a document listing 18 orders, and providing harsh punishments for every offenses. The said code was similar to those of the ancient world civilization including the Code of Hammurabi of Babylon, Code of Lygurcus of Sparta, Code of Solon of Ancient Athens and Code of Harmhad of Egypt.
Kalantiaw ruled until 1435 when he was killed in a duel with Datu Manduyog, the legitimate chief of Aklan. Soon, the latter ruled the island.
 As a Hoax
The renowned historian William Henry Scott researched about the story of Kalantiaw and discovered that it was a fraud. However, despite this, the inhabitants of Panay still believed that the legend was part of their local history, and was factual.
 See Also
- Official Website of the Municipality of Batan - Datu Bendaraha Kalantiaw. (accessed on 23 November 2007).
- An Online Guide to Philippine History - "Pre Colonial Period". (accessed on 23 November 2007).