If you are a descendant of Janke Koolstra (1901-1980) & Hein Nyp (1904-1982), you are entitled to register to get access to the data of their descendants. Please specify how you are descended from Janke & Hein!

If you have already registered: Log in

If you want to register: Register now

In order to protect the privacy of living people and to observe the privacy-regulations, those data are not accessable for others.