Blanche of Lancaster (Grosmont)
- Born: 25 Mar 1345
- Marriage: John of Gaunt Plantagenet 1st Duke of Lancaster on 19 May 1359 in Reading Abbey, Berkshire, England
- Died: 12 Sep 1369, Bolingbroke Castle aged 24
Blanche married John of Gaunt Plantagenet 1st Duke of Lancaster, son of Edward III Plantagenet , King of England and Philippa of Hainault, on 19 May 1359 in Reading Abbey, Berkshire, England. (John of Gaunt Plantagenet 1st Duke of Lancaster was born in Feb 1340 in Ghent, Flanders and died in Feb 1399 in Leicester.)
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