Rubuta ci gaba ga wannan sakin layi - An haifi Van Maanen a Hague. Ya yi karatun doka a Leiden, kuma ya shiga aikin lauya a Hague, inda daga baya ya zama babban mai gabatar da kara. Ya zama sananne a ƙarƙashin Masarautar Holland da Faransa ta mamaye, Louis Bonaparte ya nada shi Ministan Shari'a a 1806, kuma zuwa Majalisar Jiha kuma a matsayin shugaban Kotun daukaka kara a Hague a 1810 ta Napoleon. Ya dace da sauye-sauyen yanayin siyasa da kyau, duk da haka, kuma an sake nada shi Ministan Shari'a a 1815 daga Sarki William na sabuwar Masarautar Netherlands. Tare da de Nagell, ya kasance mai sanya hannu kan Yarjejeniyar Hague (1818), wanda Birtaniyya da Holland suka kafa Kotunan Mixed Anglo-Dutch. Ya kasance mai aiki a cikin inganta harshen Yaren mutanen Holland a Belgium kuma ya shawarci Sarki game da ba da izini a cikin rikice-rikicen da suka haifar da juyin juya halin Belgium
Ka yi haƙuri. Ya bar ofis a 1842, bayan da Sarki William ya yi murabus.