On 9 Mar 1625 Teunis Thomaszen married Belitje Jacobse in Naarden, Holland.
Theunis Thomaszen and Belitje Jacobs were witnesses at the 1655 baptism of their grandson Teunis, son of Hendrick Sibouszen and Weyntie Teunis.
Belitje, of Vlechtenstein, or Vleckenstyn.
Belitje was the witness at several baptisms:
1652 for her granddaughter Bellitjen, daughter of Herck Sybenszen;
1657 for her grandson Jan, son of Herrick Syboutszen and Wyntie Theunis;
1662 for her grandson Johannes, son of jacob Theuniszen Key and Hillegond Theunis;
1670 for her granddaughter Belitje, daughter of Sebastiaen V. Sevenhuysen & Marritie Theunis;
1673 for her greatgranddaughter Lysbeth, daughter of Ryck Abrahamszen & Tryntie Hercks (daughter of Wyntie Theunis); 1673 for her grandson Theunis, son of Dirck Theuniszen Quick & Hanna Jans;
1681 for Abraham, son of Jan Pieterszen & Grietie Cozyn.