- Baron Henry "Hotspur" De Percy
Birth - 20 May 1364 (43 year anniversary) - , Alnwick, NORTHUMBERLAND, England - Robert Clifford
- Aveline Fitzjohn
- Maurice Fitzgerald
Death - 20 May 1257 (150 year anniversary) - , Youghal Monaster, , Ireland - Elisabeth, Princess Of Austria
- Helgi "Magri" Eyvindsson
Death - 20 May 908 (499 year anniversary) - , , Eyjafjardar, Iceland
| |