Trijntje Posthuma, born circa 1829 (?).

Trijntje was married to
Sybrand Arends van Kammen, born circa 1825 (?), baker.

• 1 : Foekje van Kammen, born in Harlingen on September 13, 1852.
  

• 2 : Antje van Kammen, born in Harlingen on October 10, 1853.
  

• 3 : Janna Elisabeth van Kammen, born in Harlingen on April 22, 1855.
  

• 4 : Roelofke Hendrika van Kammen, born in Harlingen on June 8, 1856, died there on August 29, 1856, aged 82 days.
  

• 5 : Roelof van Kammen, born in Harlingen on March 8, 1858.
  Roelof was married to Trijntje van der Meer, born circa 1869 (?).
  

• 6 : Arendina van Kammen, born in Harlingen on June 15, 1861.
  

• 7 : Arend Djoerd van Kammen, born in Harlingen on July 18, 1863.
  

• 8 : Roelofke van Kammen, born in Harlingen on December 23, 1865, died in the year 1944, aged 79 years.
  Roelofke was married in Harlingen on December 18, 1890, at the age of 24 to Auke Tigchelaar (aged 22 years), born in Harlingen on April 5, 1868, son of Haye Gerbens Tigchelaar (sailor and merchant) and Anna Margrieta Nauta, kraanmeester.
  

• 9 : Froukje van Kammen, born in Harlingen on December 23, 1865.
  

• 10 : Janna Elisabeth van Kammen, born in Harlingen on August 1, 1867.
  

• 11 : Elisabeth van Kammen, born in Harlingen on February 13, 1869.