Klaas Yntema, born circa 1831, workman, workman and workman.

Klaas was married to
Sierddtje Tjeerds Bakker, born circa 1829.

• 1 : Sierdtje Yntema, born in Workum on March 14, 1868, christened there on March 18, 1894, dressmaker, died in Workum on January 7, 1909, aged 40 years.
  Sierdtje was married in Workum on March 29, 1890, at the age of 22 to Johannes Keimpes Feenstra (aged 24 years), born in Workum on December 29, 1865, son of Keimpe Johannes Feenstra (workman, barge hand, sailor, barge hand, barge hand, sailor, workman, workman and sailor) and Pietertje Redmers Bargsma, journeyman printer, typesetter, boekdrukker, boekdrukker, journeyman printer and journeyman printer, died in Workum on February 11, 1925, aged 59 years.