- Erika von Lucke
Birth - 20 April 1914 (74 year anniversary) - Muckenhain, Germany - Emilie Anna Schmaal
- Sophronia Johnsen
Birth - 20 April 1885 (103 year anniversary) - Brigham City, Box Elder, Utah - Johanna Heriette Hermine Mathilde Sellschopp
- Anna Emilie Knauerhase
Birth - 20 April 1864 (124 year anniversary) - Greenock, South Australia, Australia - Hermann Diestel
- William Anno
- Anna Prehn
Death - 20 April 1824 (164 year anniversary) - Ratzeburg, Germany - Nathan Hix
- Elnathan Wood
Death - 20 April 1752 (236 year anniversary) - Middleborough, , MA - Nathaniel Fuller
Death - 20 April 1750 (238 year anniversary) - Plympton, Massachusetts - Ephraim Carpenter
Death - 20 April 1743 (245 year anniversary) - Attleboro, Bristol, MA - Benjamin Carpenter
Death - 20 April 1738 (250 year anniversary) - Coventry, Tolland, CT - Hannah Gilbert
Death - before 20 April 1725 (263 year anniversary) - Stoughton, Suffolk, MA - Lydia Luther
Birth - 20 April 1723 (265 year anniversary) - , Swansea, Bristol, MA - Jerusha Fenno
- Søren Christensen Lemvig
Birth - 20 April 1709 (279 year anniversary) - København, Hovedstaden, Danmark - Søren Christensen Lemvig
Birth - 20 April 1709 (279 year anniversary) - København, Hovedstaden, Danmark - Jemina Fales
- Johann Wilhelm Brass
- Nathan Upham
- August Friedrich Eckermann
Birth - 20 April 1696 (292 year anniversary) - Neverstorf, Germany - Ammiel Weekes
Death - 20 April 1679 (309 year anniversary) - Dorchester, Suffolk, MA - Hannah Salisbury
Birth - 20 April 1671 (317 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 (812 year anniversary) - , Dublin, Leinster, Ireland
| - Heinrich Hans Ulrich "Heino" Sellschopp + Margarete Anna Maria Sophie Diedrichs
Marriage - 20 April 1946 (42 year anniversary) - Lubeck-Travemunde, Germany - Private + Anna Elizabeth Betty
Marriage - 20 April 1917 (71 year anniversary) - Granada, , Colorado - Wilhelm Paul Knauerhase + Emma Pauline Adelheid Zanker
Marriage - 20 April 1893 (95 year anniversary) - Riverton, S.A., Australia - George Duffield + Virginia Jane Pierson
- George Duffield + Virginia Jane Pierson
Marriage - 20 April 1837 (151 year anniversary) - Braxton Co., WV - Prof. Jacob Christoph Rudolf Eckermann + Catherina Maria Elisabeth Ranniger
Marriage - 20 April 1807 (181 year anniversary) - Kiel, , Germany - Oliver Mason + Phebe Martin
- Isaac Howe + Sarah Tucker
- John Prince Of England + Duchess Jacquette De Luxembourg
Marriage - 20 April 1433 (555 year anniversary) - , Therouenne, Pas-De-Calais, France - Thomas Dagworth + Eleanor de Bohun
- Hermann, Margrave Of Meissen + Regelindis von Polen
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