Wikipedia
Jungmädelbund
The Jungmädelbund (literally "Young Girl's League") was the section of the Hitler Youth for girls between the ages of 10 and 14.
It is called Jungmädelbund in German, and commonly abbreviated in period and contemporary historical writings as JM. Since this was a girls' organization, it fell under the League of German Girls, which was led by the BDM-Reichsreferentin (National Speaker of the BDM), who reported to the overall head of the Hitler Youth, Baldur von Schirach (who was later succeeded by Artur Axmann).