Semitic languages
The similarity of the Hebrew, Arabic and Aramaic languages was accepted by Jewish and Islamic scholars since medieval times. The languages were familiar to Western European scholars due to historical contact with neighbouring Near Eastern countries and through Biblical studies, and a comparative analysis of Hebrew, Arabic, and Aramaic was published in Latin in 1538 by Guillaume Postel. Almost two centuries later, Hiob Ludolf described the similarities between these three languages and the Ethiopian Semitic languages. However, neither scholar named this grouping as "Semitic".
Egyptian Arabic
The Western Egyptian Bedawi Arabic variety of the western desert differs from all other Arabic varieties in Egypt in that it linguistically is part of Maghrebi Arabic. The same was formerly true of the Egyptian form of Judaeo-Arabic. Northwest Arabian Arabic is also distinct from Egyptian Arabic.