Lambertha van Nieuwenhuizen, born in Leusden circa 1891, daughter of Cornelis van Nieuwenhuizen and Lubberta van Elten.

Lambertha was married in Amersfoort on April 24, 1913, at the age of approximately 22 to
Lodewijk Gerardus van Kamp (aged 26 years), born in Amerongen on May 28, 1886, son of Evert van Kamp (coppersmith) and Aukje Keimpes Feenstra (maid servant), traveling salesman.