[5] Raja Yusuf used the title of Sultan Mahmud Shah when holding the throne of the Perak Sultanate and ruled the Perak for three years from 1627 to 1630.
[6] It is said that Sultan Mahmud Shah's residence during his reign was located in the Geronggong area close to Kampung Gajah.
[7] Sultan Mahmud Shah died in 1630 and was buried on the banks of the Perak River, Kampung Tok Melor.
Now the location of the tomb is located in Pulau Tiga, the same area as the tomb of Sultan Muhammad Shah, the fourteenth Sultan of Perak.
[11] He had a son named Raja Kobat, who would later be known as Sultan Salehuddin who succeeded him after his death.