Hi Joyce! I am also looking for information on Samuel Zufelt and Mary Catarina Schwerdfeger. She is my 4th great-grand aunt. From the information I have, it isn't very much but I hope I can help you out. Mary Catarina was born February 15, 1800 in Williamsburg, Ontario to parents Samuel Schwerdfeger and Margaretha Grauberger (Crober). She was one of 9 kids. She married Samuel Zufelt (born February 7, 1797 in Lansingsburgh, New York and died June 11, 1849 in Jefferson, New York) on July 1, 1817 in Williamsburg. They had one son John Jacob Zufelt born March 17, 1818 in Williamsburg and died May 10, 1892 in Morrisburg, Ontario. Now from what I understand, Samuel later went on to marry Mary's 1st cousin Margaret Catherine Schwerdfeger (daughter of Johann Frederick Schwerdfeger and Elizabeth Zufelt). Which leads me to believe that Samuel and Mary and Margaret are related. Mary Catarina died March 17, 1817 while giving birth to John Jacob. John Jacob married Elizabeth Reddick born August 18, 1824 in Coteau, Quebec. I do not have a death date for her. But she is buried in Mariatown, Ontario. They married on July 4, 1841 in Williamsburg, Ontario. They had 12 kids. Which of the 12 are you related to?