"The House of Croÿ (French pronunciation: [kʁu.i]) is a family of European mediatized nobility, which held a seat in the Imperial Diet from 1486, and was elevated ...
to the rank of Princes of the Holy Roman Empire in 1594. In 1913, the family had branches in Belgium, France, Austria and Prussia.
This dynastic house, which originally adopted its name from the Château de Crouy-Saint-Pierre in French Picardy, claimed descent from the Hungarian Prince Marc, (great-grandson of King Géza II of Hungary) who allegedly settled in France in 1147, where he married an heiress to the barony of Croÿ. The Croÿ family rose to prominence under the Dukes of Burgundy. Later, they became actively involved in the complex politics of France, Spain, Austria, and the Low Countries." - (en.wikipedia.org 30.01.2020)