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Johannes Christiaan de Marez Oyens (21 January 1845, Amsterdam – 11 August 1911, Partenkirchen) was a Dutch politician.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/1f/Johannes_Christiaan_de_Marez_Oyens_copy.jpg/220px-Johannes_Christiaan_de_Marez_Oyens_copy.jpg)