| John Maurice of Nassau , 1604-1679, was count and since 1674 prince of Nassau-Siegen, the oldest brother of Dutch stadtholder William "the Silent" of Orange.John Maurice joined the Dutch army in 1621, at a very early age. He distinguished himself in the campaigns of his cousin, the stadtholder Frederick Henry, Prince of Orange. In 1626 he became captain. He was involved in 1629 in the capture of Den Bosch. In 1636, he conquered a fortress at Schenkenschans.He was appointed as the governor of the Dutch possessions in Brazil in 1637 by the Dutch West India Company on recommendation of Frederick Henry. He landed at Recife, the port of Pernambuco and the chief stronghold of the Dutch, in January 1637. Prince Maurits |  |