William Osborne McDowell | |
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| Born | April 10, 1848 Somerset, New Jersey |
| Died | March 12, 1927 (aged 78) Newark, New Jersey |
| Occupation | Businessman |
| Spouse |
Josephine Timanus
(m. 1873; died 1921) |
| Children | 7 |
| Relatives | Shepard Kollock (great-grandfather) |
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William Osborne McDowell (1848–1927) was a financier and businessman. He founded numerous patriotic organizations in the late nineteenth century including the Sons of the American Revolution. With expanding international interests, he supported Cuban independence, helped found the League of Peace in 1908 and served as its president. He made his wealth from his investment firm, specializing in railroads, mining, and land speculation.