By that time, Guelders and Zutphen controlled two different parts of the region of Hamaland, which were joined through this marriage.

In the 12th and 13th centuries, Guelders quickly expanded downstream along the sides of the Meuse, Rhine, and IJssel rivers and even claimed the succession in the Duchy of Limburg, until it lost the 1288 Battle of Worringen against Berg and Brabant.

[5] One of the most famous members of this branch is Beatrice of Falkenburg, married to the King of the Romans Richard of Cornwall.

At the end of the 12th-century the heiress of Heinsberg married her cousin from Cleves; this kept the lordship within the family, and prolonged it until 1217, when it was inherited by the House of Sponheim.

The Falkenburg branch, in turn, went extinct in 1368; their land was inherited by the Van Schoonvorst family.