Marquess Of Dorset John Beaufort 
John was born in 1373. John's father was Duke Of Lancaster John Of Gaunt and his mother was Catherine Swynford. His paternal grandparents were King Edward III Of England and Queen Of England Phillipa Of Hainault. He had three brothers named Henry, Thomas and Edmund. He had a half-brother named Henry IV. He died at the age of 37 in 1410.
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