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Isaac Roosevelt (December 19, 1726 – October 1794) was an American merchant and Federalist politician. He served in the New York State Assembly and the state Constitutional Convention and achieved the most political success of any Roosevelt before Theodore Roosevelt. Isaac was the patrilineal great-great-grandfather of President Franklin Delano Roosevelt. He was the second generation of what would later come to be known as the Hyde Park, New York branch of the extended Roosevelt family. Isaac's fortune from the refining of sugar, and his political accomplishments, became an essential root of the substantial wealth, prominence and influence that the Hyde Park Roosevelts came to amass.

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Born	19 December 1726 New York City, New York
Died	1 October 1794 (aged 67)
Zodiac	Sagittarius
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Nicholas Roosevelt (1658–1742) · Family Member · 1658-1742 · Dutch-American colonial alderman edit info

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Johannes Roosevelt · Uncle · 1689-1750 · American businessman and alderman edit info

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Isaac Roosevelt (businessman) · Grandson · 1790-1863 · American businessman edit info

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James H. Roosevelt · Family Member · 1800-1863 · Philanthropist edit info

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James Roosevelt, Sr. · Great-grandson · 1828-1900 · American businessman edit info

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Franklin D. Roosevelt · 1882-1945 · President of the United States from 1933 to 1945 edit info

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