John of Gaunt , b. Mar. 1340, 4th s. of Edward III and Philippa; cr. duke of Lancaster, 13 Nov. 1362; m. (1) Blanche, da. of Henry of Grosmont, duke of Lancaster, 19 May 1359; issue: Philippa, John, Elizabeth, Henry, Edward; (2) Constance, da. of Pedro I of Castile, Sept. 1371; issue: Katherine, John; (3) Katharine, da. of Sir Paon Roet and wid. of Sir Hugh Swynford, Jan. 1396; issue: John, Henry, Thomas, Joan (all b. before marriage); d. 4 Feb. 1399; bur. St Paul's cathedral.
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