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Daughter of Jacobus Laurentius de Koker and Amalia Maria Veraart Wife of Joannes de Bruijn Sister of Mattheus Christianus de Koker; Gertruda Joanna de Koker; Joanna Cornelia de Koker; Petrus Joannes Adrianus de Koker; Theresia Lucia de Koker and 3 others; Constant Judocus de Koker; Petrus Joannes Jacobus Laurentius de Koker and Theresia Lucia Petronilla de Koker « less