Klaas Klazes Post, born circa 1789 (?).

Klaas was married to
Trijntje Jacobs Brok, born circa 1793 (?).

• 1 : Tjitske Klazes Post, born circa 1816 (?).
  Tjitske was married in Het Bildt on June 22, 1837, at the age of approximately 21 to Pieter Stevens Wassenaar (aged approximately 23 years), born in Sint Jacobiaparochie circa 1814, son of Steven Pieters Wassenaar and Tettje Douwes Kuipers.