"Oud-Wulven en Waaijen" remained a separate entity until 1811, when it merged into Houten. This didn't last long: in 1818 they were combined with the heerlijkheden Wulven, Heemstede, Grote Koppel, Kleine Koppel, Maarschalkerweerd, and Slagmaat to a single municipality called "Oud-Wulven.
"Oud-Wulven en Waaijen" remained an independent entity until 1811 when it merged with Houten. However, this union was short-lived as in 1818 they were combined with the other "heerlijkheden" (districts) of Wulven, Heemstede, Grote Koppel, Kleine Koppel, Maarschalkerweerd, and Slagmaat to form a single municipality called "Oud-Wulven".