Bahrain

Rulers (Hakim)
The style of the ruler was: Hakim al-Bahrayn ("Ruler of Bahrain")
Sheikh Ahmad ibn Khalifah Al Khalifah (1783 - 1796)
Sheikh Abdullah ibn Ahmad Al Khalifah (1796 - 1843)
- jointly with the following three:
Sheikh Sulman ibn Ahmad Al Khalifah (1796 - 1825)
Sheikh Khalifah ibn Sulman Al Khalifah (1825 - 1834)
Sheikh Muhammad ibn Khalifah Al Khalifah (1st time) (1834 -1842)
Sheikh Muhammad ibn Khalifah Al Khalifah (2nd time) (1843-1868)
Sheikh Ali ibn Khalifah Al Khalifah (1868 - 1869)
Sheikh Muhammad ibn Khalifah Al Khalifah (3rd time) (Sep-Dec 1869)
Sheikh Muhammad ibn Abdullah Al Khalifah (Dec 1869)
Sheikh `Isa ibn Ali Al Khalifah (Dec 1869 - 9 Dec 1932)
Sheikh Hamad ibn Isa Al Khalifa (1872-1942) (9 Dec 1932 - 24 Feb 1942)
Sheikh Salman ibn Hamad Al Khalifa (1895-1961) (24 Feb 1942 - 2 Nov 1961)
Sheikh `Isa ibn Sulman Al Khalifah (2 Nov 1961 - 16 Aug 1971)

Emirs
The style of the ruler was: Amir ad-Dawlat al-Bahrayn (Emir of the State of Bahrain)
Sheikh `Isa ibn Sulman Al Khalifah (16 Aug 1971 - 6 Mar 1999)
Sheikh Hamad ibn `Isa Al Khalifah (6 Mar 1999 - 14 Feb 2002)

King
The style of the ruler is: Malik al-Bahrayn (King of Bahrain)
Sheikh Hamad ibn `Isa Al Khalifah (14 Feb 2002 - present).

President of the State Council
Sheikh Khalifah ibn Sulman Al Khalifah (19 Jan 1970 - 16 Aug 1971)

Wikipedia