Yes. Estate named Black Forest. Actual Black Forest is in Germany, Estate in Austria is only named after it.
Epstein could have gotten an investor passport. Austria issues them for someone who invests big bucks in Austria. c. 10,000,000 Euros. Yeah, could tie into estate.
Otherwise he'd have to have had an Austrian parent to get an Austrian passport.
Either way, and regardless of the reason for the passport, he'd have to qualify for it. I've read stories it had been renewed and expired recently. Doesn't mean it can't be renewed, either. Important bit of info here. EU passport very handy.