Zeger III of Ghent

Zeger III of Ghent (called The Good) was the lord of Heusden, of Bornhem, and of Saint-Jean Steen, and the Châtelain of Ghent. He was the second son of Zeger II, Lord of Ghent and Petronella of Coutrai. His older brother, Arnold, died before 1190, leaving him the heat to the estate of his parents. He took his title of lord of Ghent, Bornhem, and Saint-Jean Steen around 1199. He married Beatrix of Heusden, and through her became Lord of Heusden, a title which was held by his son and progeny.

Beatrix was the daughter of Hughes of Heusden, son of Anselm III, Lord of Heusden (not to be confused with his cousin, Hughes of Heusden, son of Anselm's brother Eustace, Lord of Choques).

Philip I of Namur, margrave of Namur and Regent of Flanders with his brother, Baldwin I of Constantinople, fought in the fourth crusade and won the crown of Constantinople. While they were abroad, along with John of Nesle, Zeger was entrusted to the administration of Flanders, being noted in the record in this role in dealings in 1206 and 1210.

In 1211, Zeger attended the marriage of Ferdinand of Portugal with Joan of Constantinople, daughter of Baldwin I of Constantinople. On returning to Flanders with his army, the couple was accompanied by Philip I of Namur, Ziger, and John of Nesle, châtelain of Bruges. Joan's first cousin, Louis (the future Louis VIII of France) - eldest son of Philip Augustus and Joan's aunt, Isabella of Flanders - held the couple prisoner while he seized the towns of Aire and Saint-Omer. Upon release, Ferdinand began an attempt to regain these towns.

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