John of Gaunt, Duke of Lancaster, was the third surviving son of Edward III and one of the wealthiest magnates in medieval Europe. He commanded armies in France and Spain, exercised great influence during Richard II’s minority and claimed the Castilian throne through his second wife.
His long relationship with Katherine Swynford produced the Beaufort children, later legitimised. His legitimate son Henry Bolingbroke overthrew Richard and became Henry IV. John of Gaunt was born in Ghent and died in Leicester Castle.
In Nathen Amin’s The House of Beaufort, the Beaufort family began with the children of John of Gaunt and Katherine Swynford, born outside marriage but later legitimised and drawn into the highest ranks of English politics. Alison Weir’s Katherine Swynford follows Katherine Swynford from the household of Blanche of Lancaster to her long relationship and eventual marriage with John of Gaunt. John of Gaunt is treated fictionally in Candace Robb’s A Gift of Sanctuary, Paul Doherty’s A Pilgrimage to Murder, Candace Robb’s A Spy for the Redeemer, Philip Gooden’s Chaucer and the Doctor of Physic, and Philip Gooden’s Chaucer and the House of Fame.