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Daughter of Willem Daniel Jonker and Helena Dorothea Jonker Sister of Adolph Jacobus Jonker; Johannes Gerhardus Jonker; Willem Daniel Jonker; Lambertus Petrus Jonker; Marthinus Frederik Roelof Jonker and 4 others; Petronella Johanna Jonker; Helena Dorothea Maria Wagener; Anna Margaretha Jonker and Petronella Johanna Wagener « less