A number of medieval deaths are noted on this day in history…
1016 – Æthelred the Unready, English son of Edgar the Peaceful (b. 968) https://en.wikipedia.org/wiki/%C3%86thelred_the_Unready
1124 – Alexander I of Scotland (b. 1078) https://en.wikipedia.org/wiki/Alexander_I_of_Scotland
1307 – Joan of Acre (b. 1272) https://en.wikipedia.org/wiki/Joan_of_Acre
1400 – Aubrey de Vere, 10th Earl of Oxford, English politician and nobleman (b. c. 1338) https://en.wikipedia.org/wiki/Aubrey_de_Vere,_10th_Earl_of_Oxford
1407 – Olivier de Clisson, French soldier (b. 1326) https://en.wikipedia.org/wiki/Olivier_de_Clisson