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Son of Dionysius Adrianus Petrus Norbertus Koolen and Maria Agnes zum Gahr Brother of Maria Gesina Agnes Koolen; Carolina Maria Elisabeth Koolen; Petrus Norbertus Maria Koolen; Antoinette Jeannette Clotilde Koolen; Marie Anne Agnes Koolen and 1 other; and Dionysius Alphonsus Adrianus Koolen « less