Rosina von Graben von Rain zu Sommeregg, also called Rosina von Rain was an Austrian noble woman descending from the House of Graben von Stein, a cadet branch of the Meinhardiner dynasty.
Rosina"s father was the Carinthian noble Ernst von Graben (d 1513), son of Andreas von Graben (d 1463), who ruled as burgrave at Sommeregg Castle.
Ernst"s brother Virgil von Graben was a very powerful Austrian noble, Habsburg stattholder in the County of Görz (Gorizia) and Maximilan"s councillor. Rosina was born at her father"s residence Sommeregg near present-day Seeboden in Carinthia. Upon Ernst"s death in 1513, she followed him up as Burggräfinance (a sort of Viscountess) of the Sommeregg estates.
She became also Lady of Doberdò del Lago within the comital lands of Görz.
The couple sold Doberdò del Lago to the Counts of Attimis in 1522 and concentrated on consolidating their Carinthian possessions. Rosina"s tomb chapel is to be found of at the „Sankt Michaelskirche“ in Lienz.