15 August 1844–26 January 1935 (Age 90)
Aalsmeer, North Holland, Netherlands
When Dorethea Hendrika Maria Roos was born on 15 August 1844, in Aalsmeer, North Holland, Netherlands, her father, Hendrick Roos, was 23 and her mother, Neeltje Been, was 18. She married Ernst Landwaard on 11 July 1868. They were the parents of at least 4 sons and 3 daughters. She died on 26 January 1935, in Bloemendaal, Gouda, South Holland, Netherlands, at the age of 90.