Pieter Clerk, born circa 1804 (?), died in Leeuwarden on July 25, 1862, aged approximately 58 years.

Pieter was married (1) to
Geltje Bruining, born circa 1803 (?), died in Leeuwarden on November 26, 1857, aged approximately 54 years.

• 1 : Bernardus Clerk, born in Leeuwarden on May 2, 1844, saddler.
  Bernardus was married on May 17, 1872, at the age of 28 (1) to Jitske Klazes Feenstra (aged 24 years), born in Heerenveen on April 10, 1848, daughter of Klaas Wybes Feenstra (castellan and innkeeper) and Aaltje Ulbes Heeringa, died in Heerenveen on February 27, 1882, aged 33 years.
  Bernardus was married in Schoterland on December 28, 1882, at the age of 38 (2) to his sister in law Elisabeth Sophia Stoett (aged 40 years), born in Leeuwarden on April 13, 1842, daughter of Frederik August Stoett (opzichter der eerste klasse bij den waterstaat and architect) and Petronella Folkertsma.
  Elisabeth was married before in Leeuwarden on August 31, 1875, at the age of 33 to Wiebe Klazes Feenstra (aged 31 years), born in Heerenveen on July 13, 1844, son of Klaas Wybes Feenstra (castellan and innkeeper) and Aaltje Ulbes Heeringa, shop assistant, castellan and innkeeper, died in Heerenveen on July 15, 1880, aged 36 years.
  

Pieter was married (2) to
Zwaantje Le Heux, born circa 1804 (?).