Saudi Arabia replaces Kingdom of Nejd and Hejaz
Etymology
Following the amalgamation of the Kingdom of Hejaz and Nejd, the new state was named al-Mamlakah al-ʿArabīyah as-Saʿūdīyah (a transliteration of المملكة العربية السعودية in Arabic) by royal decree on 23 September 1932 by its founder, Abdulaziz bin Saud. Although this is normally translated as "the Kingdom of Saudi Arabia" in English, it literally means "the Saudi Arab kingdom", or "the Arab Saudi Kingdom".The word "Saudi" is derived from the element as-Saʿūdīyah in the Arabic name of the country, which is a type of adjective known as a nisba, formed from the dynastic name of the Saudi royal family, the Al Saud (Arabic: آل سعود). Its inclusion expresses the view that the country is the personal possession of the royal family. Al Saud is an Arabic name formed by adding the word Al, meaning "family of" or "House of",  to the personal name of an ancestor. In the case of Al Saud, this is Saud ibn Muhammad ibn Muqrin, the father of the dynasty's 18th-century founder, Muhammad bin Saud.