Androbin Batman's name in the enrollment records
Androbin Batman was a student enrolled at a Trill music academy sometime in Joran Belar's lifetime.
In 2371, Batman's name was among those that came up when Benjamin Sisko and Julian Bashir searched enrollment records for all Trill music academies while seeking information on Belar. (DS9: "Equilibrium", display graphic)
This character was only mentioned in writing.