Cornelius Van Schaack "C.V.S." Roosevelt (January 30, 1794 – July 17, 1871) was an American businessman from New York City. He was a member of the prominent Roosevelt family and the paternal grandfather of U.S. President Theodore Roosevelt. Early life Roosevelt was born on January 30, 1794, in New York City, to James Jacobus Roosevelt and Maria Helen Van Schaack. He was the last full-blooded Dutch Roosevelt of his line. His great-grandfather was Johannes Roosevelt, the founder of the Oyster Bay branch of the Roosevelt family. Through his grandfather Cornelius Van Schaack Jr., he was a grandnephew of Peter van Schaack and great-great-grandson of Maria Schuyler from the Schuyler family. Through Maria, he was a great-great-great-grandnephew of Dutch-American settler Philip Pieterse Schuyler and a great-great-great-grandson of David Pieterse Schuyler. Cornelius's younger brother, James John Roosevelt, served as a United States Congressman from New York from 1841 until 1843. He attended Columbia College but academic life did not suit him, and he did not graduate. Career In 1818, after leaving college, Roosevelt became his father's partner in importing hardware. "Economy is my doctrine at all times," he once said, "at all events till I become, if it is to be so, a man of fortune." At his insistence, the focus of the business changed from hardware to plate glass. After his father's death in 1840, he inherited a large fortune and was one of the five richest men in New York City. He continued to work in the business until his retirement in 1865. In the Panic of 1837, he bought many lots in Manhattan for building. In 1844, when New York Chemical Manufacturing Company's original charter expired, the chemical company was liquidated and was reincorporated as a bank only, becoming the Chemical Bank of New York in 1844. Roosevelt was among its first directors under its new charter, along with John D. Wolfe, Isaac Platt and Bradish Johnson, and the bank's president John Q. Jones. The company sold all remaining inventories from the chemical division as well as real estate holdings by 1851 and later became the present day Chase Bank. Personal life On October 9, 1821, Roosevelt married Margaret Barnhill (1799–1861), a daughter of Robert Craig Barnhill and Elizabeth Potts. She was a descendant of English and Irish Quakers and of Thomas Pott of Wales. They had six sons: Silas Weir Roosevelt, James Alfred Roosevelt, Cornelius Van Schaack Roosevelt