Falk is a name common to many Jewish rabbis:
1. JACOB JOSHUA, who died at Frankfort-on-the-Main in 1756, is the author of novellas on different treatises of the Talmud, for which see Furst, Bibl. Jud. 1:271 sq.
2. JOSHUA BEN-ALEXANDER hak-Kohen, who died about 1620, was rabbi at Lemberg, and wrote commentaries on the Jewish ritual, entitled,
דרישה ופרישה; he also wrote derashas on the Pentateuch. See Furst, loc. cit. page 272; De' Rossi, Dizionario Storico (Germ. transl.), page 103.
3. JOSHUA BEN-JOSEPH, who died in 1648, was rabbi at Cracow, and wrote discussions on some 'Talmudic treatises. See Furst, loc. cit. page 273 sq.
4. JOSHUA of Lissa, was rabbi at Hamburg, and wrote under the title עמק יהושע, i.e., The Valley of Joshua, expositions on sections of the Pentateuch. See Fiirst, loc. cit. page 273; De' Rossi, loc. cit. page 103; Jocher, Allgemeines Gelehrten-Lexikon, s.v. (B.P.)