Rabbi in Vienna at the beginning of the seventeenth century. According to G. Wolf, he is identical with Abraham Austerlitz. Flesch is the author of a eulogy beginning with the words "Arid be-Siḥi," which appeared at the conclusion of the "Minḥat Yiẓḥaḳ" of Isaac b. Judah Löb Mentz of Nikolsburg (Amsterdam, 1688).
- Steinschneider, Cat. Bodl. col. 1128;
- Landshuth, 'Ammude ha-'Abodah, p. 10;
- Zunz, Literaturgesch. p. 442;
- Wolf, Juden in der Leopoldstadt, 1st Addenda.