Jannes Tjarks, born in Warffum on March 3, 1731, died in Uithuizen on July 15, 1799, son of Tjark Jannes and Anje Klasen.

He was married in Warffum on December 1, 1754 to
Grietje Berends, born in Warffum on June 2, 1732, died in Uithuizen on January 4, 1798, daughter of Berent Hindricks and Geertruid Derks.

• 1 : Cornelis Jannes, born in Warffum, christened there on November 23, 1755, died in Uithuizen on January 27, 1827.
  He got the banns published in Uithuizen on April 11, 1789 and was married there on April 27, 1789 in church (1) to Anje Jans, born in Uithuizermeeden circa 1747, died in Uithuizen on April 4, 1819.
  (She was married before in Uithuizermeeden on March 10, 1771 in church to Simen Walles, born in Uithuizermeeden, died before 1789.)
  He was married in Uithuizen on August 19, 1820 (2) to Trientje Doekes van der Hoek, born in Uithuizen on July 27, 1787, christened there on August 5, 1787, died there on January 22, 1827, daughter of Doeke Jans van der Hoek and Hilje Derks Ezinga.
  

• 2 : Pieter Jannes, born in Uithuizen in February 1770, died there on October 16, 1831.
  He got the banns published in Uithuizen on October 23, 1796 and was married in Uithuizermeeden on November 20, 1796 in church to Trijntje Cornelis Maring, born in Uithuizermeeden, christened there on August 23, 1772, died in Uithuizen on May 24, 1830, daughter of Cornelis Harms and Bauke Jans.