Aloisia Wagner  (born 1906/1907, date of death unknown), professionally known as stage name Violetta was an American entertainer born without legs or arms, a condition known as tetra-amelia syndrome. She had a lengthy career in sideshow performance. She was born in Hemelingen, Germany. Her mother was named Elise.
Wagner she left Bremen -Hemelingen, on 23 March, 1924 with her step brother and manager, Karl Grobecker, aboard the SS George Washington. They arrived in New York on April 3. She performed in sideshows as a singer, including Coney Island's Dreamland and the Ringling Bros. and Barnum & Bailey Circus. She moved herself by hopping from place to place on the bottom of her torso, and was able to manipulate objects with her mouth enough to comb her own hair, dress herself, thread a needle, and sew. Violetta was married and wore her wedding band on a gold chain around her neck.