Succession to the Bahraini throne is determined by primogeniture amongst the male descendants of Sheikh Isa bin Ali Al Khalifa (1848 – 1932). However, the ruling King of Bahrain has the right to appoint any of his other sons as his successor if he wishes to. The current ruler of Bahrain is King Hamad bin Isa Al Khalifah.
Present line of succession
After Isa bin Muhammad Al Khalifa come firstly the descendants of Hakim Hamad bin Isa Al Khalifa, and then last in line the descendants of Hakim Isa bin Ali Al Khalifa.
References
Line of succession to the Bahraini throne Wikipedia(Text) CC BY-SA