Isaac Roosevelt, Sr.

Isaac Roosevelt was a member of the Convention for the adoption of the Constitution of the United States assembled at Poughkeepsie, June 7, I 788, from the City and County of New York.
~• the sixth son of Jacobus Roosevelt (1692–1776) and Catharina Hardenbroek, who wed in 1713
~• in wikipedia

Isaac was the patrilineal great-great-grandfather of President Franklin Delano Roosevelt.

Isaac Roosevelt achieved the most political success of any Roosevelt before Theodore Roosevelt.

• 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.
  • During the 1700s, sugar was Europe's most valuable traded agricultural commodity, and it was cultivated almost entirely by slave labor in the Caribbean.

Wikipedia Biographical Summary:

"...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. He was the great-great-grandfather of U.S. President Franklin Delano Roosevelt.

Roosevelt was born in New York City and baptized in the Reformed Dutch Church of New York. A member of the Roosevelt family, he was the son of Jacobus Roosevelt, grandson of Nicholas Roosevelt, and great-grandson of the immigrant Claes Martenzsen Van Rosenvelt..."

"...He married Cornelia Hoffman, the daughter of a prominent Dutchess County landowner, on September 22, 1752. They had ten children, including Jacobus (James), great-grandfather of Franklin Delano Roosevelt. He died in October 1794..."

during the Revolution: "A noted patriot, he was elected to the New York Provincial Congress on April 22, 1775. He was one of the Committee of One Hundred that took control of the state government in May 1775. Though he felt no allegiance to England, he was initially a moderate, hoping to prevent conflict. However, he withdrew from New York when the British occupied the city, and spent the period of occupation at his wife's home in Dutchess County, serving with the Sixth Regiment of the Dutchess County Militia."
SOURCE: Wikipedia contributors, 'Isaac Roosevelt (politician)', Wikipedia, The Free Encyclopedia, 4 August 2011, 18:13 UTC, <http://en.wikipedia.org/w/index.php?title=Isaac_Roosevelt_(politici...> [accessed 12 August 2011]