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.
In the 1350s the Hungarian monarch, Louis I, was able to assemble a force of 50,000 men by joining his forces with reinforcements sent by the Duke of Austria, the Counts of Gorizia, the Lord of Padua, Francesco I da Carrara, and the Patriarchate of Aquileia, a state within the Holy Roman Empire.