The Sudairi Seven (Arabic: السديريون السبعة, as-Sudayriyyūn as-Sabʿah), also spelled Sudairy or Sudayri, is the commonly used name for a powerful alliance of seven full brothers within the House of Saud. They are also sometimes referred to as the Sudairi Clan (Arabic: عائلة السديري ʿĀʾilat as-Sudayrī) or the Sudairi faction. They all are sons of King Abdulaziz 'Ibn Saud' and his wife Hussa Sudairi. The oldest (Fahd) served as king from 1982 to 2005; the second- and fourth-oldest (Sultan and Nayef) served as crown prince but predeceased King Abdullah, and the sixth-oldest (Salman) succeeded Abdullah as king in 2015. With the 2017 death of Prince Abdul Rahman only the two youngest of the Seven survive.
In the early twentieth century, King Abdulaziz rapidly expanded his power base in Nejd to establish the Kingdom of Saudi Arabia in 1932, and became its first King. As part of this process of expansion, he married women from powerful Nejdi and other Arabian families to cement his control over all parts of his new domain. It is believed he married as many as 22 women as a result. One of these marriages was to Hussa bint Ahmed Al Sudairi, a member of the Al Sudairis, a powerful clan in Nejd, where the Wahhabi ideology emerged nearly 300 years ago.