Judah ibn Kuraish (Hebrew: יהודה אבן קריש, Arabic: يهوذا بن قريش, fl.
While his grammatical works advanced little beyond his predecessors, he was the first to study comparative philology in Hebrew, Aramaic, and Arabic.
He recognized that the various Semitic languages are derived from one source and that although they are different in their development, they are subject to the same linguistic laws.
Judah's grammatical researches were original, and he maintained his views regardless of the Mishnah and the Talmud so he has been erroneously considered a Karaite[citation needed].
He warns the community not to neglect the study of the Targumim since they are important for a correct knowledge of the Bible, which contains many Aramaisms.