Klaas Jakobs Glas, born in Oosternieland (gem Uithuizermeeden) on January 3, 1760, died after 1819.

He was married in Oosternieland (gem Uithuizermeeden) on November 20, 1791 (1) to
Claeske Harms, born in Uithuizermeeden, christened there on May 4, 1755, died there on December 13, 1817, daughter of Harm Cornelis and Jantjen Jans.

He was married in Uithuizermeeden on April 21, 1819 (2) to
Geertje Sibelts, born in Uithuizermeeden on December 5, 1784.

• 1 : Jacob Klasen, born in Uithuizermeeden circa 1821.
  He was married in Usquert on October 19, 1843 (1) to Eike Jans Wieringa, born in Usquert circa 1823, died before 1874, daughter of Jan Gerrits Wieringa and Stijntje Jans Homan.
  He was married in Uithuizen on December 12, 1874 (2) to Geesje Grutter, born in Norg circa 1832, daughter of Roelf Grutter and Aaltje Egberts.
  (She was widow of Harm van der Molen, died before 1874.)
  

• 2 : Hindriktje Klaassens, born in Uithuizermeeden circa 1824.
  She was married in Uithuizermeeden on May 3, 1845 (1) to Sijbolt Pieters Bos, born in Uithuizermeeden circa 1817, died before 1849.
  She was married in 't Zandt on June 25, 1849 (2) to Aarent Kornelis Hoving, born in 't Zandt circa 1818, son of Kornelis Derks Hoving and Geertje Jans.