Pietje Leenderts van de Akker, born circa 1814 (?).

Pietje was married to
Dirk Klazes de Groot, born circa 1812, worker.

• 1 : Klaas de Groot, born in Wier on July 15, 1837, worker, died in Arum on May 28, 1918, aged 80 years.
  Klaas was married in Wonseradeel on May 8, 1869, at the age of 31 to Jeltje Robijns de Jong (aged 32 years), born in Lollum on June 22, 1836, daughter of Robijn Jans Arbeider (worker and worker) and Saackjen Gialts Kooistra, died after May 28, 1918, aged at least 81 years.