The Jacob Sisters were a German girl group formed by the Jacob siblings – Johanna Jacob, Rosi Jacob, Eva Jacob and Hannelore Jacob. Originating from Schmannewitz in Saxony, they began singing as the Schmannewitzer Heidelerchen in their parents’ café before moving to Leipzig and studying at the Weimar Musikhochschule and later in Frankfurt. Their breakthrough came in 1964 with the single "Träume der Liebe" / "So einen Boy" under the name Geschwister Jacob, followed by "Was hab’ ich dir getan" / "Tut mir leid Jonny Boy" in 1965, which marked their transition to the stage name Jacob Sisters. Throughout the 1960s the group released a series of pop and MOR singles, including the charting "So ist ein Boy" (1966) and the parody "Wärst du Dussel doch im Dorf geblieben" (1968), and participated in the Deutsche Schlager-Festspiele, achieving an eighth-place finish with "So ist ein Boy". The group performed internationally, sharing stages in Las Vegas and New York with artists like Louis Armstrong and Duke Ellington, and appeared on German television programs such as Musikantenstadl. After Hannelore Jacob’s death in 2008 and Johanna Jacob’s death in 2015, the Jacob Sisters remain remembered for their contributions to German Schlager and pop music.
