Mohammed bin Salman bin Abdulaziz Al Saud
Mohammed bin Salman bin Abdulaziz Al Saud or MBS for short, is the likely heir to the throne in the Saudi ruling clan. As of 2018, he effectively has assumed the duties of Saudi Arabia Head of State in all but name from his ailing father, 85 year old King Salman, who is suffering from Alzheimer's disease.
His name essentially translates to Mohammed son of Salman son of Ibn Saud. Ibn Saud was the founder of the modern state of Saudi Arabia on the Arabian Penninsula in 1925, supplanting the Hashemite dynasty which had ruled Mecca since the 10th century. The new kingdom was given diplomatic recognition by the UK in 1926 and the US in 1933. Since Saud's passing in 1953, successorship to the throne has passed sideways among six of his 45 sons (ibn Saud became king of the Arabian Penninsula by gaining the allegiance of rival tribal chieftans who cemented the alliance by offering a daughter in marriage). It remains unclear what legal claim MBS has to the throne.