Guillaume de Steenhuys

Willem van Steenhuys, Lord of Flers (1558–1638) was a noble magistrate and diplomat in the Spanish Netherlands.

Family Van Steenhuys was born at Lannoy on 8 October 1558, son of Jan van Steenhuys, Lord of Linghen, and Charlotte Preys.

In June 1617 and January 1619 he travelled to Antwerp and Leuven to investigate the publication of Corona Regia, a scandalous libel of James VI and I. In 1618–1619 he undertook a mission to the King of France, and in 1620 to Ambrogio Spinola in the Rhine Palatinate. On 8 May 1622 he was appointed to the Council of State and in October of the same year he was discharged as a privy councillor and despatched to assist the Spanish delegation at the Diet of Regensburg (1623). The same year he was knighted.

He returned to Brussels in April 1623. On 1 January 1627 he was appointed to the Admiralty council.

Van Steenhuys died in Brussels on 30 April 1638 and was buried in the Dominican church.