Jacobus Coert died on the 21st of July 1908 in Wormen. His wife Johanna Hardam died on the 3rd of July 1902 in Hardam. His son Jan Cornelis died on the 28th of October 1949 in Apeldoorn. Jan Cornelis married to J.M. van Duuren on the 28th of May 1903 in Apeldoorn.