Theresia is the usual Dutch and German form of the name Teresa, and may refer to: Theresia of Dietrichstein, German countess and noted beauty Edith Stein, also known as St. Teresa Benedicta of the Cross, German Jewish philosopher, Roman Catholic nun, martyr and saint Theresia Degener, German jurist and professor of law Theresia Gouw, American entrepreneur and venture capital investor Theresia Haidlmayr, Austrian politician Theresia Kiesl, Austrian retired middle distance runner Theresia van der Pant, Dutch sculptor Theresia Singer, opera singer Wikipedia