John Holland, 1st Duke of Exeter – Wikipedia
A trio of interesting deaths on this day in history.
1120 – Gerard Thom (The Blessed Gerard), founder of the Knights Hospitaller (b. c. 1040) https://en.wikipedia.org/wiki/Blessed_Gerard
1400 – John Holland, 1st Duke of Exeter (b. c. 1352) https://en.wikipedia.org/wiki/John_Holland,_1st_Duke_of_Exeter
1420 – Robert Stewart, Duke of Albany (b. 1340) https://en.wikipedia.org/wiki/Robert_Stewart,_Duke_of_Albany