The Rainer zu Rain family (also Von Rain, Rainer, Von Rain zu Sommeregg) is an old Lower Bavarian noble family. The family represented a branch of the Vitztum von Straubing[1] and held the hereditary rank of chief chamberlain in the Duchy of Bavaria. The line from Rain zu Sommeregg, which immigrated to Carinthia at the beginning of the 16th century, was raised to the rank of baron as heirs of von Graben to burgraves and lords of Sommeregg.