 The first recorded mention of Ilsfeld itself is in an 1102 charter of Emperor Henry IV granting land in "Ilisvelt" to the Bishopric of Speyer.The name presumably designated the entire area and may have been derived from the Schozach, whose upper reaches appear to have been called the Ils.In 1157, after threats from King Conrad III, Ilsfeld returned to Hohenstaufen control.