| Katharine (Plantagenet), of Lancaster | |
| D: | 2 June 1418 |
| Henry III (Ivrea), King of Castile and Leon | |
| M: | 1393 |
| D: | 25 Dec. 1406 |
| Constance (Ivrea), of Castile | |
| D: | June 1394 |
| John (Plantagenet), of Gaunt, 1st Duke of Lancaster | |
| B: | March 1340 |
| St. Bavo's Abbey, Ghent, Belgium | |
| M: | Sept. 1371 |
| D: | 3 Feb. 1398/99 |
| Leicester Castle, Leicester, Leicestershire, England | |
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