- Charles Mann Willard
Birth - 11 April 1843 (2 year anniversary) - Hennepin, Putnam, IL - Hans Jürgen Schlüter
- Ole Mortensen
Birth - 11 April 1803 (42 year anniversary) - Blistrup, Frederiksborg, Den. - Timothy Phelps
- Robert Crossman III
- Georg Frans Prætorius
- Carsten Eckermann
Birth - 11 April 1672 (173 year anniversary) - Hohenhorn, Lauenberg, Germany - Anthony Fisher
- Thomas Mayo
Birth - 11 April 1619 (226 year anniversary) - Cattistock, Dorset, England - Constantine Darrel
- Cardinal Henry Beaufort
Death - 11 April 1447 (398 year anniversary) - , Winchester, Hampshire, England - Geofrey Scrope
- Roger de Mortimer
Birth - 11 April 1374 (471 year anniversary) - , Usk, Monmouthshire, England - Llewelyn Ap Iorwerth
Death - 11 April 1240 (605 year anniversary) - Aberconwy, Arllechwedd Isaf, Caernarvonshire, Wales - William Marshall
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