Olga Emily Boissevain (1875-1949)

Three children of Amsterdam newspaper editor Charles Boissevain (1842-1927) migrated to America.
 * 1) Eugen Jan Boissevain (1880-1949), an importer of coffee from Java, married two notable 20th Century American women - suffragist Inez Milholland (1886-1916), for whom he migrated to New York, and Pulitzer-prizewinning poet Edna St. Vincent Millay (1892-1950).
 * 2) His sister Olga Boissevain (1875-1949) married Dutch sea captain and explorer Abraham Jacob van Stockum (1864-1935). Their daughter Hilda van Stockum Marlin (1908-2006) was a well-known artist and wrote 25 books for children. Their son Willem van Stockum (1910-1944) was apparently the first person to notice possible closed timelike curves, which could permit time travel, in Einstein's theory of general relativity.