The era covered by the text ranged from the opening of Kedah by Merong Mahawangsa, described as a descendant of Dhu al-Qarnayn until the acceptance of Islam.
The royal fleet of Merong Mahawangsa, whilst sailing from Rome to China, was attacked by a legendary giant phoenix called Garuda.
Raja Seri Mahawangsa began the tradition of sending "flowers of gold and silver" as gifts to the Siamese King every time he bore a son.
When the king was overthrown by his subjects due to his wickedness, his son was enthroned with the title of Raja Phra Ong Mahapudisat.
Below is the list of the eight rulers of Langkasuka, Merong and his descendants, according to the Kedah Annals: KD Mahawangsa is a vessel of the Royal Malaysian Navy named in honour of the first monarch.