Between 1273 and 1308 Adolphus V the Pomeranian, second-born brother of Count John II the One-Eyed of Holstein-Kiel, resided on the castle. Adolphus V was succeeded by John's second-born son Adolphus VII, ruling 1308 to 1315. In 1315 Adolphus VII was slain on Siegburg Castle in his bed by a group of knights led by Hartwig Reventlow personally at feud with him. Holstein-Segeberg was then reincorporated into Holstein-Kiel, itself merged into Holstein-Rendsburg in 1390.
