John of Gaunt 

*Mar 1340 - †3 Feb 1399
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a) Catherine Swynford Roet is mother of: John Beaufort (*?), Henry Beaufort (*?), Joan Beaufort (*?) and Thomas Beaufort (*?)

b) Blanche of Lancaster is mother of: Philippa of Lancaster (*?), Elizabeth (*1364) and Henry IV (*1366)

c) Constanza (Constance) is mother of: Katherine (*?)

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