David upheld his support for his niece, the former Empress-consort, who had how many children?
England and King David I The relationship between the Kingdom of England and King David I, who was King of Scotland between 1124 and 1153, was partly shaped by David's relationship with the particular King of England, and partly by David's own ambition. David had a good relationship with and was an ally of Henry I of England, the King who was largely responsible for David's early career. After Henry's death, David upheld his support for his niece, the former Empress-consort, Matilda, and expanded his power in northern England in the process, despite his defeat at the Battle of the Standard in 1138.
Sancha, heiress of León Sancha of León (born 1191 or 1192) was the eldest child and daughter of Alfonso IX of León by his first queen, Theresa of Portugal. She was raised at the court of their father, but her younger sister Dulce and her brother Ferdinand were raised with their mother in Portugal after the annulment of their parents' marriage in 1195. Although in Castile it was customary for females to inherit, and Sancha's stepmother became queen, briefly, of Castile, in León female succession was barred, although her ancestor Urraca had been the first queen regnant of Western Europe.