John of Gaunt Picture of a famous 'John' from English history. A Plantagenet prince, the rich and powerful John of Gaunt (1340 - 1399 ). His liaison with a commoner called Katherine Swynford produced four illegitimate children who were given the name Beaufort ( He married Katherine in 1396 and their children, by this time adults, were legitimised).Their son John was the Great-Great Grandfather of King Henry VIII of England | 
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Diddle, diddle, dumpling, my son John, Went to bed with his trousers on; One shoe off, and one shoe on, Diddle, diddle, dumpling, my son John! |