Reinhard Boelens, Baron van Lynden, was the son of Frans Godard Ayzo, Baron van Lynden and Cornelia Johanna Maria van Borcharen. He married Maria Catharina Pallandt (1834-1905).
Baron van Lynden was the purchaser of Arrangement in Yellow and Grey: Effie Deans y183, which he bought through E. J. van Wisselingh. After seeing Arrangement in Grey and Black: Portrait of the Painter's Mother y101, he considered commissioning Whistler to paint a portrait, but the idea came to nothing.
Young, Andrew McLaren, Margaret F. MacDonald, Robin Spencer, and Hamish Miles, The Paintings of James McNeill Whistler, New Haven and London, 1980 . 'Reinhard Boelens, baron van Lynden', GENI website.