Maartje Jongejans, born in Assendelft on August 7, 1863.

Maartje was married to
Simon Zwart, born in Wormerveer on January 5, 1865.

• 1 : Simon Zwart, born in Wormerveer on September 3, 1891, bricklayer and bouwbedrijf, died in Zaanstad on August 20, 1974, aged 82 years.
  Simon was married in Haarlemmerliede on May 23, 1917, at the age of 25 (1) to Lijsberta Geertruida Visser (aged 23 years), born in Haarlemmerliede on November 20, 1893, died in Zaandam on December 25, 1924, aged 31 years.
  Simon was married in Assendelft on December 10, 1927, at the age of 36 (2) to Elisabeth Tigchelaar (aged 24 years), born in Harlingen on July 13, 1903, daughter of Roelof Gerrits Tigchelaar (potatodealer, workman, shopkeeper, bargeman, worker, workman and earthenware baker) and Gerritje Elisabeth Koster, died in Zaanstad on May 25, 1984, aged 80 years.