Katherine of Lancaster

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English Royalty
House of Plantagenet
Armorial of Plantagenet
Edward III
Edward, Prince of Wales
Lionel, Duke of Clarence
John, Duke of Lancaster
Edmund, Duke of York
Thomas, Duke of Gloucester
Joan of England
Isabella, Countess of Bedford
Grandchildren
Richard II
Philippa, Countess of Ulster
Philippa, Queen of Portugal
Elizabeth, Baroness Fanhope and Milbroke
Henry IV
Katherine, Queen of Castile
Edward, Duke of York
Richard, Earl of Cambridge
Constance of York
Anne, Countess of Eu

Catherine of Lancaster (also known as Katherine Plantagenet and as Queen Catalina of Castile and Leon) (1372/1373 – 2 June 1418) was the daughter of John of Gaunt, 1st Duke of Lancaster, and his second wife, Constance of Castile.

She married Enrique III of Castile in 1393 at Burgos. As her mother was daughter of Pedro of Castile, and had been a claimant to the Castilian throne herself, the marriage helped to restore a semblance of legitimacy to the Trastamara line.

The couple had three children:

Maria of Castile (1401-1458), who married Alfonso V "the Magnanimous", King of Aragon and Naples,
Catharina of Castile, who wed Enrique of Aragón, Duque de Villena,
Juan II (1405-1454), who succeeded his father as King of Castile. His mother Catherine and his uncle, Ferdinand, served as co-regents during his minority, and Catherine alone was regent after Ferdinand's death in 1406.

Queen Catherine died at Valladolid of a stroke, possibly precipitated by her great obesity, leaving her thirteen year-old son at the mercy of self-interested courtiers.