- Erika von Lucke
Birth - 20 April 1914 (94 year anniversary) - Muckenhain, Germany - Emilie Anna Schmaal
- Sophronia Johnsen
Birth - 20 April 1885 (123 year anniversary) - Brigham City, Box Elder, Utah - Johanna Heriette Hermine Mathilde Sellschopp
- Anna Emilie Knauerhase
Birth - 20 April 1864 (144 year anniversary) - Greenock, South Australia, Australia - Hermann Diestel
- William Anno
- Anna Prehn
Death - 20 April 1824 (184 year anniversary) - Ratzeburg, Germany - Nathan Hix
- Elnathan Wood
Death - 20 April 1752 (256 year anniversary) - Middleborough, , MA - Nathaniel Fuller
Death - 20 April 1750 (258 year anniversary) - Plympton, Massachusetts - Ephraim Carpenter
Death - 20 April 1743 (265 year anniversary) - Attleboro, Bristol, MA - Benjamin Carpenter
Death - 20 April 1738 (270 year anniversary) - Coventry, Tolland, CT - Hannah Gilbert
Death - before 20 April 1725 (283 year anniversary) - Stoughton, Suffolk, MA - Lydia Luther
Birth - 20 April 1723 (285 year anniversary) - , Swansea, Bristol, MA - Jerusha Fenno
- Søren Christensen Lemvig
Birth - 20 April 1709 (299 year anniversary) - København, Hovedstaden, Danmark - Søren Christensen Lemvig
Birth - 20 April 1709 (299 year anniversary) - København, Hovedstaden, Danmark - Jemina Fales
- Johann Wilhelm Brass
- Nathan Upham
- August Friedrich Eckermann
Birth - 20 April 1696 (312 year anniversary) - Neverstorf, Germany - Ammiel Weekes
Death - 20 April 1679 (329 year anniversary) - Dorchester, Suffolk, MA - Hannah Salisbury
Birth - 20 April 1671 (337 year anniversary) - Milton, Norfolk, Massachusetts - Joan Arches
- Elizabeth Mortimer
- Baroness Alianore (Eleanore) Le Strange
- Randolf de Dacre
- Robert de Ross
- Richard "Strongbow" Fitzgilbert Clare
Death - 20 April 1176 (832 year anniversary) - , Dublin, Leinster, Ireland
| - Heinrich Hans Ulrich "Heino" Sellschopp + Margarete Anna Maria Sophie Diedrichs
Marriage - 20 April 1946 (62 year anniversary) - Lubeck-Travemunde, Germany - Private + Anna Elizabeth Betty
Marriage - 20 April 1917 (91 year anniversary) - Granada, , Colorado - Wilhelm Paul Knauerhase + Emma Pauline Adelheid Zanker
Marriage - 20 April 1893 (115 year anniversary) - Riverton, S.A., Australia - George Duffield + Virginia Jane Pierson
- George Duffield + Virginia Jane Pierson
Marriage - 20 April 1837 (171 year anniversary) - Braxton Co., WV - Prof. Jacob Christoph Rudolf Eckermann + Catherina Maria Elisabeth Ranniger
Marriage - 20 April 1807 (201 year anniversary) - Kiel, , Germany - Oliver Mason + Phebe Martin
- Isaac Howe + Sarah Tucker
- John Prince Of England + Duchess Jacquette De Luxembourg
Marriage - 20 April 1433 (575 year anniversary) - , Therouenne, Pas-De-Calais, France - Thomas Dagworth + Eleanor de Bohun
- Hermann, Margrave Of Meissen + Regelindis von Polen
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