Lütold von Regensberg, VI

Either Lütold V von Regensberg or his son Ulrich (+ 1280) has established the fortified town of Neu-Regensberg, but when Lütold V died about 1250, his two sons Lütold VI and Ulrich divided the inheritance: Lütold VI retained the ancestral castle [Altburg, Switzerland] and the extensive free float, his brother Ulrich received Neu-Regensberg and the possessions in the Limmattal, and so the lines Alt-Regensberg and Neu-Regensberg were established. But, finally, both lines failed to establish a bailiwick in opposition to namely the Habsburg family, and the expanding city of Zürich that tried to establish long-distance trading routes.

https://en.m.wikipedia.org/wiki/Regensberg_family

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