Sybren Gonggrijp, born in Harlingen on June 17, 1862, son of Yede Gonggrijp and Eva Catharina Huizinga.

Sybren was married to
Sytje Klein, born circa 1868 (?).

• 1 : Yde Gonggrijp, born in Harlingen on February 24, 1891.
  Yde was married in Harlingen on June 18, 1923, at the age of 32 to Aafke Severein (aged 23 years), born in Harlingen on October 11, 1899, daughter of Tjerk Severein and N.N..
  

• 2 : Frederik Gonggrijp, born in Harlingen on July 25, 1893.
  

• 3 : Trijntje Gonggrijp, born in Harlingen on March 23, 1896.
  

• 4 : Hendrik Gonggrijp, born in Harlingen on August 11, 1900.
  Hendrik was married in Harlingen on October 5, 1925, at the age of 25 to Jantje Wouters (aged 20 years), born on January 4, 1905.