Hermann I (died 10 December 949) was the first of the Wetterau family, nicknamed the Conradine to be Duke of Swabia (from 926), the son of Gebhard II von Wetterau, Duke of Lorraine, and a cousin of King Conrad I of Germany. When duke Burchard II died at Novara, while campaigning in Italy, King Henry the Fowler gave the duchy to Hermann. By investing the duke at a reichstag at Worms, the king clearly demonstrated that he, not the tribal noblesse, had the right to appoint the duke. Hermann married Regilinda, the widow of Burchard.