Hyachinthe-Marie de Brouchoven (1650–1707), Lord of Steen and Spy, was a Flemish nobleman who became president of the Great Council of Mechelen.
[1] He was born the son of Jean-Baptiste de Brouchoven, Count of Bergeyck, and his wife Hélène Fourment.
In 1678 he was elected to become member of the Council of Namur and resigned his function in Ghent.
He was a diplomat in the service of the Spanish crown and proven to be a loyal advisor.
He participated in Lille to the treaty of Ryswyck, where he was elected to become 19th president of the great council by royal command of 7 May 1699.