Willem Hendrik van Loon Dutch noble, together with his wife lived in the house now called Museum van Loon, 1855-1935 (1855–1935) Parents Hendrik Maurits Jacobus van Loon Children Hendrik Maurits Jacobus van Loon Siblings Ada Wilhelmina van Loon Louis Antoine van Loon Jkvr. Olga Catherine Antoinette van Loon Partners Thora van Loon-Egidius