Jan Tjebbes Veenstra, born circa 1776 (?).

Jan was married to
Lamke Jans van der Veen, born circa 1780 (?).

• 1 : Jan Fedde Jans Veenstra, born in Nijehaske on March 7, 1803, christened there on March 27, 1803, died in Leeuwarderadeel on May 15, 1835, aged 32 years.
  Jan was married in Achtkarspelen on July 1, 1826, at the age of 23 to Froukje Wybes de Vries (aged 28 years), born de Rijp on April 14, 1798, christened in Surhuisterveen on December 23, 1798, daughter of Wybe Pieters de Vries and Ymkjen Wobbes (bargewoman), died in Leeuwarderadeel on December 5, 1862, aged 64 years.
  Froukje was married afterwards in Leeuwarderadeel on July 23, 1842, at the age of 44 to Johannes Alles Algra (aged 29 years), born in Leeuwarden on November 27, 1812, son of Alle Halbes Algra and Janke Johannes, died in Leeuwarderadeel on September 26, 1842, aged 29 years. Johannes was married afterwards to Janke Johannes, born circa 1813 (?). Froukje was married afterwards in Leeuwarderadeel on November 30, 1843, at the age of 45 to Klaas Pieters Huizinga (aged approximately 55 years), born in Lippenhuizen circa 1788, son of Pyter Classes and Swaantje Sibes, died in Leeuwarderadeel on June 23, 1845, aged approximately 57 years.