His son Egbert built a small castle or keep (actually more just a fortified manor house) in Ouderkerk aan de Amstel, probably on the spot where the Sefardi cemetery Beth Haim was later sited.

When Floris V in January 1296 thought he could realize his expansionism at the expense of Flanders with the support of the French king, Philip IV, he made a fatal mistake.

The English king, Edward I, against whose Flemish interests Floris V had entered, ordered Gijsbrecht's cousin, Jan I van Cuijk, to take the count of Holland into hostage and transfer him to England.

He found refuge in 's-Hertogenbosch, the northern border town of the Duchy of Brabant, where he enjoyed ducal protection and received material support from his influential nephew Jan I van Cuijk.

[citation needed]) The description of the coat of arms: barry of gold and sable (black), in eight pieces, over which a motley St. Andrew's cross of silver and gules (red) in two rows.