The dynasty probably hailed from the Rhenish Franconian Siegharding dynasty, which originally descended from the Kraichgau region and in the 10th century ruled in the Chiemgau of the German stem duchy of Bavaria.
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Rosina von Graben von Rain zu Sommeregg, also called Rosina von Rain (15th century — 1534 (?)) was an Austrian noble woman descending from the House of Graben von Stein, a cadet branch of the Meinhardiner dynasty.