Mansur Shah I of Pahang

Sultan Mansur Shah ibni Almarhum Sultan Ahmad Shah I (died 1519) was the fourth Sultan of Pahang from 1495 to 1519. He succeeded his father, Ahmad Shah I upoin his abdication in 1495, and reigned jointly with his cousin, Abdul Jamil Shah I. He assumed full control after the death of the latter in 1512.

Personal life
Sultan Mansur was known as Raja Mansur before his accession. He was the only son of the second Sultan of Pahang, Ahmad Shah I by his wife, a daughter of Bendahara Tun Hamzah of Pahang. He had a sister from his father's other wife named Raja Wad or Raja Olah.

From his marriage to an unknown woman, Sultan Mansur had two daughters, Raja Puspa Dewi and Raja Kesuma Dewi. Raja Puspa Dewi was married to Raja Ahmad bin Raja Muhammad, a Terengganuan prince from House of Malacca. She had a son from this marriage, named Raja Umar, the future Ali Jalla Abdul Jalil Shah II of Johor.

In 1511, following the Portuguese Capture of Malacca, Sultan Mahmud retreated to Pahang where he stayed a year. During his stay, he arranged a marriage between Sultan Mansur and his daughter Raja Dewi, whose mother was a Kelantanese princess.

Reign
Raja Mansur ascended to the throne at a very young age following the abdication of his father, Ahmad Shah I, who went into religious seclusion in 1495. As Pahang at that time was a Malaccan vassal, Sultan Mahmud of Malacca had sent his minister Seri Dewa Raja to install his preferred new ruler. Raja Jamil was selected and was styled Abdul Jamil Shah I. It appears he reigned jointly with Sultan Mansur, and had exercised authority over the young Sultan.

The reign of the two sultans oversaw the restoration of ties between Pahang and Malacca, that were previously marred by diplomatic tension during the reign of Ahmad Shah. In 1500, the two states cooperated to defeat an invasion by the Nakhon Si Thammarat Kingdom on the instruction of Ramathibodi II of Ayutthaya. It was the last Siamese attempt, of this period, to subjugate the southern Malay states.

Following the death of his joint ruler and cousin, Sultan Abdul Jamil, Sultan Mansur became the sole ruler and assumed full control in 1512. Earlier in 1511, the city of Malacca was conquered by Portugal, bringing the rule of the Malacca Sultanate to an end, and as such ended Pahang's status as a vassal. However, the Portuguese still recognised Pahang as a vassal, on the pretext that the city is now under their control, and demanded tribute. Sultan Mansur refused to pay the annual tribute, which resulted in open warfare between Pahang and the Portuguese.

Death
Around 1519 Sultan Mansur was killed by a group of hulubalang, for committing adultery with one of the former wives of his father. The story was narrated in the Bustanus al-Salatin. According to the Malay Annals, his killing was on the instruction of his father, the former Sultan Ahmad, who was living in seclusion at Lubuk Pelang. Sultan Ahmad also died shortly afterwards and was also buried at Lubuk Pelang.