Cissy van Marxveldt
Setske de Haan , better known by her pen name Cissy van Marxveldt, was a Dutch writer of childrens books. She is best known for her series of Joop ter Heul novels.
Setske de Haan was born onNovember 1889 in Oranjewoud, a village in the northern province of Friesland in the Netherlands. She was the daughter of IJnze de Haan, a headmaster and history teacher, and Froukje de Groot.
Source: Wikipedia