I'm trying to find information about my grandmother's parents. She was born in 1922 in Groningen to Anna Marie Roerink and Jan Roerink (I believe). Jan died around the time of her birth, so I am not sure if Roerink was his last name or her maiden name. My grandmother was named Janna. Jan worked for the JB Wolter publishing company at the time. Anna later married a Louie Donkelmans or Dongelmans, and they lived in Arnhem. My grandmother had been there during the second world war. There was a son, Jan, as well as two daughters, Marie and Annie.
Any information that you could provide would be a huge help!