The Kedah Sultanate began during the Srivijaya reign and continue till this day, here's the order;

Sultan Mudzafar Shah 1 (Srivijaya)                                      1136-1179                  Sultan Mu'adzam Shah                                                               1179-1201                 Sultan Muhammad Shah                                                           1201-1236             Sultan Mudzaffar Shah 2                                                            1236-1280          Sultan Mahmud Shah 1                                                               1280-1321          Sultan Ibrahim Shah                                                                    1321-1373          Sultan Sulaiman Shah                                                                  1373-1422              Sultan Ataulah Muhd Shah 1                                                    1422-1472         Sultan Muhd Jiwa Zainal Abidin 2                                          1473-1506             Sultan Mahmud Shah 2                                                                1506-1546            Sultan Mudzaffar Shah 3                                                             1546-1602           Sultan Sulaiman Shah 2                                                                1602-1625            Sultan Rijaluddin Muhammad Shah                                       1625-1651          Sultan Muhyiddin Mansur Shah                                               1651-1661        Sultan Dziaddin Mukarram Shah                                              1661-1687        Sultan Ataullah Muhd Shah 2                                          1687-1698                  Sultan Abdullah Al-Mu'adzam Shah                       1698-1706                        Sultan Ahmad Tajuddin Halim Shah 1                   1706-1709                          Sultan Muhd Jiwa Zainal Abidin 2                            1710-1778                             Sultan Abdullah Mukarram Shah                                              1778-1795         Sultan Zainal Rashid Al-Mu'adzam Shah 1            1843-1884                          Sultan Ahmad Tajuddin Mukaram Shah                1854-1879                              Sultan Zainal Rashid Mu'adzam Shah 2                   1879-1881                            Sultan Abdul Hamid Halim Shah                                1881-1943                     Sultan Badlishah (my gandpa's brother)             1943-1958                                      Sultan Abdul Halim Mu'adzam Shah (my uncle)         1958- till today

                                                          DAULAT TUANKU 

            (Long Live His Royal Highness)