- Xavier, Joseph Tresch
Death - 21 April 1978 (12 year anniversary) - Mulhouse, Haut-Rhin, Alsace, France - Joseph Gerthoffer
Death - 21 April 1961 (29 year anniversary) - Ribeauvillé, Haut-Rhin, Alsace, France - Jean, Yves Gerthoffer
Death - 21 April 1908 (82 year anniversary) - Sainte-Foy-la-Grande, Gironde, Aquitaine, France - René, André Gerthoffert
Birth - 21 April 1899 (91 year anniversary) - Reims, Marne, Champagne-Ardenne, France - François-Joseph Gerthoffer
Death - 21 April 1863 (127 year anniversary) - Mulhouse, Haut-Rhin, Alsace, France - Joseph Gerthoffer
Birth - 21 April 1850 (140 year anniversary) - Burnhaupt-le-Haut, Haut-Rhin, Alsace, France - Jean-Jacques Gerthoffer
Death - 21 April 1789 (201 year anniversary) - Burnhaupt-le-Haut, Haut-Rhin, Alsace, France - Johannes-Theobaldus Hirt
Birth - 21 April 1713 (277 year anniversary) - Burnhaupt-le-Bas, Haut-Rhin, Alsace, France
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