Philippa of Lancaster, Queen of Portugal, princess of England
Princess Philippa of Lancaster, LG (31 March 1360 Leicester Castle – July 19, 1415 Odivelas) was an English princess, daughter of John of Gaunt, 1st Duke of Lancaster (a son of Edward III of England and Philippa of Hainault) by his first wife and cousin Blanche of Lancaster. Blanche was the daughter of Henry of Grosmont, 1st Duke of Lancaster and Isabel de Beaumont.
Philippa became Queen consort of Portugal through her marriage with King John I, celebrated on 11 February 1387 in the city of Porto. This marriage was the final step in the Anglo-Portuguese alliance, against the France-Castile axis. Philippa is remembered for being a generous and loving queen and for being the mother of the "Illustrious Generation" (in Portuguese, Ínclita Geração) of princes, whose members were:
- Blanche (1388-1389), named after her grandmother;
- Afonso (1390-1400), named after several Kings of Portugal, including his great-grandfather Afonso IV;
- Edward (1391-1438), named after his great-grandfather Edward III of England. He was a writer and an intellectual, who succeeded his father as King of Portugal in 1433;
- Peter (1392-1449), named after his grandfather Peter I of Portugal. He was the First Duke of Coimbra, a remarkable ruler and well-travelled man, who served as Regent during the minority of his nephew Afonso V;
- Henry the Navigator (1394-1460), first Duke of Viseu, who guided Portugal to the Great era of The Discoveries, named after his great-grandfather Henry of Grosmont;
| 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 |
Philippa died of plague in 1415, a few days before the expedition to Ceuta. She was buried at the Monastery of Batalha.
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