This person is commemorated on a memorial in Leek. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.
Gonna de Groot was married to Levie Oudgenoeg, a fruit merchant and a meat carver. His nickname was 'Rikkertie'. He died shortly after the war had started. Addition of a visitor of the website