Through the maternal Knesebeck-Milendonck line and the Finck von Finckenstein counts, the tree connects into the Hohenzollerns and, beyond them, to the Bourbons, the Capetian kings, and Charlemagne. The chain is documented but carries one important caveat.
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Caveat at one link. The connection into the Hohenzollern descent passes through a link of illegitimate origin noted in the source research. Everything above that point is conventional royal genealogy shared by most European noble houses; everything below it is the verified Morgan / Uslar tree. Confidence tiers are shown on every figure.