Ship named Sedvich

My Great Grandmother Marie Larsdtr emigrated to the US in 1876. I have found her leaving Trondheim on May 11 1876 on the ship the Tasso. Written family history says that "It took 3 weeks to come across the ocean on the boat Sedvich". I can not find any referance to a Sedvich in the on line sources. Do you know of any ship with this name or close to it. It's destination would have been New York. Thanks Carla