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.
Barthélemy Duhamel died on 19th April, 1705 in Geneva. Jean-Pierre Dumest died on 19th April, 1822 in Saint-Nicolas d'Aliermont. Nicolas-François Monnier died on 19th April, 1840 in Saint-Nicolas d'Aliermont. Louis-Nicolas Heu died on 19th April, 1845 in Saint-Nicolas d'Aliermont. Céleste-Victoire Seigneur died on 19th April, 1869 in Saint-Nicolas d'Aliermont. Charles-César Vacheron died on 19th April, 1870 in Geneva. Philémon Huguenin died on 19th April, 1885 in Les Ponts-de-Martel. Édouard-Isidore Cailly died on 19th April, 1890 in Saint-Nicolas d'Aliermont.