Jan Hendrik married Sara Piers (March 9, 1858—January 30, 1945) on May 10, 1877. They had seven children, with three surviving to adulthood:
- Harm Henry—born February 20, 1878, died August 12, 1965;
- Dena—born April 1, 1879, died February 12, 1880;
- Dena—born November 29, 1880, died December 19, 1880;
- Dena—born December 10, 1881, died July 21, 1925;
- Kate—born January 4, 1884, died April 20, 1978;
- Gertie—born November 9, 1885, died October 30, 1889; and
- John—born October 15, 1887, died May 27, 1890.
Jan Hendrik died on November 8, 1904.