- Erich Karl Julius Justus Emil Garthe
Death - 21 March 1932 (44 year anniversary) - Rostock, Mecklenburg, Germany - Walter F. Elrod
- Adolf Heinrich Eckermann
Death - 21 March 1850 (126 year anniversary) - Ratchau near Lubeck, Germany - Moses Vose
- Johannes Prætorius
- Edward J. Boomer
Birth - 21 March 1821 (155 year anniversary) - Genesee Co., New York (now called Wyoming County) - John Newcome
- John Plumb
Death - 21 March 1728 (248 year anniversary) - Milford Twp, New Haven Co. CT - John Martin
Death - 21 March 1713 (263 year anniversary) - Swansea, Bristol Co., MA - James Lyon
- Samuel Smith
Death - 21 March 1698 (278 year anniversary) - Fairfield, Fairfield, CT - Patrick Lyon
Death - 21 March 1459 (517 year anniversary) - At Belhelvies, Aberdineshire, Scotland - Henry Iv King England
Death - 21 March 1413 (563 year anniversary) - , Westminster, Middlesex, England - Jean Count de Brienne
Death - 21 March 1237 (739 year anniversary) - , , Constantinople, Turkey - Robert Prince Of France
Death - 21 March 1076 (900 year anniversary) - , Fleury-Sur-Ouche, France - Ælle von Northumbria
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