Dirk Philippus Helfrich, born on December 13, 1789, christened in Leeuwarden on December 20, 1789, died before September 26, 1858, aged at most 68 years.

Dirk was married to
Antje Cornelis Feenstra, born on August 25, 1796, christened in Harlingen on September 13, 1796, daughter of Cornelis Baukes (peat cutting supervisor and bargeman) and Jetske Freerks, died in Idaarderadeel on September 26, 1858, aged 62 years.

• 1 : Cornelis Fredrik Helfrig, born in Harlingen on April 9, 1820.
  

• 2 : Jetske Durks Helfrich, born in Harlingen on September 27, 1821.
  

• 3 : Cataryna Dirks Helfrich, born in Wartena on June 29, 1825, died there on July 7, 1825, aged 8 days.