Florent of Hainaut

Florent of Hainaut (c. 1255–1297), son of Count John I of Hainaut and Adelaide of Holland, held the stadholdership of Zeeland before leaving the Low Countries to serve Charles II of Naples as constable.

In 1289 he married Isabella of Villehardouin, heiress of Achaea, and ruled the principality in her right, negotiating the Treaty of Glarentsa with Byzantium in 1290. When the Greeks retook Kalamata in 1293 he protested rather than reopen the war. He died in 1297 besieging Saint George castle in Arcadia, leaving his daughter Matilda as heir.