Pytje Wybes van der Schaaf, born circa 1811 (?).

Pytje was married to
Jacob Jerps Piersma, born circa 1800, gardener.

• 1 : Grietje Jacobs Piersma, born in Rauwerd on December 26, 1834, died in Oosterlittens on May 19, 1914, aged 79 years.
  Grietje was married on April 24, 1858, at the age of 23 (1) to Bauke Ottes Feenstra (aged 28 years), born in Eernewoude on April 8, 1830, son of Otte Baukes Feenstra (peat cutting supervisor, barge hand and worker) and Hinke Lykeles Haarsma, journeyman baker and baker, died in Oosterlittens on March 3, 1875, aged 44 years.
  Bauke was married at the same time in Rauwerderhem on April 24, 1858, at the age of 28 (2) to Grietje Jacobs Piersma, born in Rauwerd on December 26, 1834.
  Grietje was married at the same time in Rauwerderhem on April 24, 1858, at the age of 23 (2) to Bauke Ottes Feenstra, born in Eernewoude on April 8, 1830.
  Grietje was married in Baarderadeel on September 27, 1877, at the age of 42 (3) to Eewolt Poelstra (aged approximately 50 years), born in Noordhorn circa 1827, son of Evert Eewolts Poelstra (shopkeeper) and Albertje Tammes Beilsma, journeyman baker.