Jonas Berthoud was born on 19th April, 1769 in Fleurier.
Frédéric Guillaume Japy was born on 19th April, 1774 in La Grange-la-Dame near Montbéliart.
Joh. Jakob Zach was born on 19th April, 1778.
Clémence Marie Marguerite Japy was born on 19th April, 1784 in Montbéliard.
Désirée-Hyacinthe Dumouchel was born on 19th April, 1806 in Saint-Nicolas d'Aliermont.
Antoine-Sostène Croutte was born on 19th April, 1808 in Saint-Nicolas d'Aliermont.
Johann Friedrich Weule was born on 19th April, 1811 in Altwallmoden (Landkreis Goslar am Harz).
Achille-Désiré Cailly was born on 19th April, 1836 in Saint-Nicolas d'Aliermont.
Marie-Rosine Letellier was born on 19th April, 1837 in Saint-Nicolas d'Aliermont.
Albertine-Augustine Fihue was born on 19th April, 1838 in Saint-Nicolas d'Aliermont.
Louis-Benjamin Audemars was born on 19th April, 1850.
Marie Lina Huguenin (Virchaux) was born on 19th April, 1851 in La Chaux-du-Milieu.
Pierre-Alexandre Robillard was born on 19th April, 1862 in Saint-Aubin-le-Cauf.
Theodor Julius Beyer was born on 19th April, 1887 in Zürich.