The source for the list of sultans given here is the official genealogy given for the Sultan of Kedah.[9] There are however discrepancies with the Kedah Annals as it lists only 5 sultans from the first convert Mudzaffar Shah to Sulaiman Shah who was captured by Aceh in 1619, in contrast to the twelve listed here. The rest of the list largely follows as that given in the Kedah Annals with the exception of a few changes and more recent updates in the 20th and 21st century.[10]