- Baron William Willoughby
- Elizabeth Calston
Birth - 6 December 1400 (9 year anniversary) - Of, Littlecote, Wiltshire, England - Baron John Sutton of Dudley IV
Birth - 6 December 1361 (48 year anniversary) - Of, Malpas, Chester, England - Fernando IV Sanchez, "Citatus" De Castilla y León
- Affonso I Henriquez "The Conqueror", King of Portugal
Death - 6 December 1185 (224 year anniversary) - Mosteiro Decelas, Coimbra, Coimbra, PORTUGAL
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