Regent

Regent is the title held by someone who rules in name of the King or a Lord because the ruler is a child or incapacitated. A regent's rule ends when a child heir reaches their sixteenth nameday, as sixteen years old is considered the legal age of adulthood in the Seven Kingdoms.

If the Regent rules in the name of the King of the Andals and the First Men, he or she also hold the title of Protector of the Realm. A royal Regent also holds a seat in the small council, taking the place of the young monarch.

If a king dies and his own queen acts as Regent for their children, she is known as a "Queen Regent". Regents for regular lordships may be referred to as "Lord Protector", or are simply referred to as "Lord Regent", or (if female) "Lady Regent". As by definition the King's death is required for a regency, the title "King Regent" is not used for male regents, simply "Lord Regent".

Known Regents

 * Lady Lysa Arryn, ruling as Lady Regent of the Vale in name of her son Robin Arryn.
 * Lord {Eddard Stark}, Lord of Winterfell, Warden of the North and Hand of the King, declared Regent and Protector of the Realm by Robert Baratheon in his will. Ned, however, was betrayed, arrested and executed for treason and never assumed the Regency.
 * Queen Cersei Lannister, declared herself Queen Regent to her son King Joffrey Baratheon, after betraying Eddard Stark.