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Son of Johan Gerretsen and Hendrika Wilhelmina Knaake Husband of Jantje Dieperink Father of Johan Hendrik Gerretsen and Egbert Gerretsen Brother of Gerrit Willem Gerretsen; Cornelis Hendrik Gerretsen; Geertje Gerretsen; Johannes Hendricus Gerretsen; Alexander Christiaan Gerretsen and 2 others; Frederik Willem Gerretsen and Willem Gerretsen « less