And the attacking midfielder has now signed a scholarship deal at Anfield.
Frauendorf will join Marc Bridge-Wilkinson and his Under-18 squad ahead of the new campaign after being capped by Germany in the Under-15s and Under-16s.
Hoffenheim will be awarded a player development training allowance.
Frauendorf is the third highly regarded teenager to arrive at the academy in recent weeks.
Polish goalkeeper Fabian Mrozek of FC Wroclaw and SMS Lodz midfielder Mateusz Musiałowski both signed up earlier this summer.
Musialowski scored on his Under-18 debut this weekend as Layton Stewart’s hat-trick and Tom Hill’s strike helped Liverpool to a resounding 5-0 victory over Crewe Alexandra.