Sylvester Marius, son of Jacob Marius Groen and Mary Salisbury, was born in 1708 and died in 1755 in Kingston, Ulster Co., NY at the age of 47. He married 2 times. The first time he married Maria Taveri on October 25, 1741. She was born in 1701 and died on June 27, 1742 at the age of 41. The second time he married Femmetje Bergen, daughter of Hans Machielse Bergen and Rachel Bensing, on April 18, 1745 in New York, NY. She was born on July 29, 1715 in Brooklyn, Kings Co., NY and died on October 31, 1793 in New York, NY at the age of 78.

Elizabeth Marius, daughter of Sylvester Marius and Femmetje Bergen, was born on May 20, 1753 in New York, NY and died on April 14, 1830 in New Brunswick, Middlesex Co., NJ at the age of 76. She married Daniel Kemper, son of John Jacob Kemper and Maria Regina Ernistin, on May 20, 1785 in New York, NY. He was born on August 28, 1749 in New Brunswick, Middlesex Co., NJ and died on August 6, 1847 in New Brunswick, Middlesex Co., NJ at the age of 97.

David Jackson Kemper, son of Daniel Kemper and Elizabeth Marius, was born on December 24, 1789 in Pleasant Valley, Dutchess Co., NY and died on May 24, 1870 in Nashotah, Waukesha Co., WI at the age of 80. He married 2 times. The first time he married Jerusha Lyman, daughter of William Lyman, on May 2, 1816. She was born in 1778 and died on November 2, 1818 at the age of 40. The second time he married Ann Relf, daughter of Samuel Relf and Sarah Poyntell, on October 9, 1821 in Philadelphia, Philadelphia Co., PA. She was born on December 16, 1803 in Philadelphia, Philadelphia Co., PA and died on May 15, 1832 in Norwalk, Fairfield Co., CT at the age of 28.