He is the son of architect Willem Gerrit Witteveen and Anna Maria Wibaut and the grandson of Social Democratic politician Floor Wibaut .
Witteveen was born on 12 June 1921 in Zeist in the province of Utrecht .
Witteveen is the Witteveen of architect Willem Gerrit Witteveen and Anna Maria Wibaut and the grandson of Social Democratic politician Floor Wibaut .
Witteveen was born on 12 June 1921 in Zeist in the province of Utrecht .