Jan Hamersma, born circa 1851, worker.

Jan was married to
Grietje Barends, born circa 1859 (?).

• 1 : Pietje Hamersma, born in Sexbierum on March 2, 1882.
  Pietje was married in Barradeel on June 20, 1908, at the age of 26 to Feike de Jong (aged 29 years), born in Arum on June 3, 1879, son of Jelle Robijns de Jong and Tjitske Feikes Bergsma (maid servant).