- Elvira Austrid Nielsen
Death - 21 May 1909 (4 year anniversary) - Salt Lake City, Salt Lake, , Utah - Heinrich Meier
- Alfred Crossman
Death - 21 May 1885 (28 year anniversary) - Milton, , Mass. - Richard Emil Butter
- Sophie Georgia Clausen
Death - 21 May 1875 (38 year anniversary) - Sokkelund, Kobenhavn, Denmark - Ezra M. Boomer
- Simon Isaak Bondi
- Thomas Weatherbee
Death - 21 May 1752 (161 year anniversary) - Dedham, Norfolk, Mass - John Bullock
Birth - 21 May 1751 (162 year anniversary) - Rehobeth, Bristol, MA - Anna Elisabeth Eckermann
Birth - 21 May 1745 (168 year anniversary) - Woldhof, Germany - Mary Mason
Birth - 21 May 1713 (200 year anniversary) - Swansea, Bristol, MA - Miriam Carpenter
- Sarah Leonard
- John WINSLOW
Death - 21 May 1634 (279 year anniversary) - Boston, Suffolk Co, MA - Samuel Wolf Oppenheim
- Joane Martyn
Death - 21 May 1616 (297 year anniversary) - , Sherford, Devonshire, England - Johannes Prætorius II
- 2nd Duke Of Norfolk Thomas Howard
Death - 21 May 1524 (389 year anniversary) - Farlingham Castle, Farlingham, Norfolk, England - Giles Daubney
Death - 21 May 1507 (406 year anniversary) - , London, Middlesex, England - John Bourchier
- Thomas Wake
- Charles Prince Of Franks
Death - 21 May 992 (921 year anniversary) - , Kerker, Orleans, France
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