Sjoerdtje Gaatzes Tulp, born circa 1830 (?).

Sjoerdtje was married to
Douwe Pieters Hiemstra, born circa 1826 (?).

• 1 : Trijntje Douwes Hiemstra, born in Hardegarijp circa 1853, boeredienstmeid.
  Trijntje was married on October 11, 1877, at the age of approximately 24 to Jan Jans Tolsma (aged 30 years), born in Leeuwarden on December 1, 1846, son of Jan Dirks Tolsma (worker) and Trijntje Johannes Swart, farmer's hand.
  Jan was married before in Leeuwarderadeel on October 5, 1871, at the age of 24 to Jisseltje Albertus Steensma (aged 25 years), born in Beers on December 2, 1845, daughter of Albertus Hendrikus Steensma (gardener, pedlar and shopkeeper) and Korneliske Cornelis Feenstra, died in Wijtgaard on January 17, 1872, aged 26 years. Jan was married before on June 28, 1873, at the age of 26 to Aukje Gerrits Oudendijk (aged approximately 20 years), born in Marrum circa 1853, daughter of Gerrit Gerhardus Oudendijk (carpenter) and Ytje Hendriks Prins, died before October 11, 1877, aged at most 24 years.