Isaac Roosevelt

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. Early life Roosevelt was born in New York City and baptized in the Reformed Dutch Church of New York. He was the sixth son of Jacobus Roosevelt (1692–1776) and Catharina Hardenbroek, who wed in 1713. His siblings were Johannes (b. 1714), Johannes (b. 1715), Nicholas (b. 1717), Helena (1719–1772), Jacobus (b. 1721), Christoffel (b. 1724), Abraham (b. 1729), Sara (b. 1730), and Adolphus Roosevelt (b. 1735). His paternal grandfather was Nicholas Roosevelt (1658–1742) and his great-grandfather was the Dutch immigrant Claes Maartenszen Van Rosenvelt (d. 1659), who established the Roosevelt family in America. His maternal grandparents were Johannes Hardenbroek and Sarah (née Van Laer) Hardenbroek. Career