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".
Isa (name)
There is a major discrepancy between the Hebrew/Aramaic and Muslim Arabic forms of this name, since the Hebrew form of this name has the voiced pharyngeal ʿAyin or ʿAyn consonant at the end of the name (as does Christian Arabic "yasūʿ"), while the Muslim Arabic form "ʿīsā" has the ʿAyn at the beginning of the name. For this reason, some (such as Ahmed Deedat) state the Arabic name Isa is related to the Biblical name Esau (which begins with a pharyngeal); it is also similar in the vowels to an Aramaic version of Jesus, viz. "Eeshoʿ" (Aramaic forms of the name, however, still have the voiced pharyngeal `Ayn consonant at the end of the name). [Other Aramaic pronunciations of the same name include yeshuuʕ (ʕ is IPA ayin). Vowels in Semitic languages are somewhat fluid between dialects while consonants are structurally more stable. The vowels in an Anglicized quote "Eesho`" by themselves are insignificant for this discussion since "i" and "e" and short "a" can interchange between dialects, and "u" and "o" can also interchange between dialects. The dominant consonsonantal discrepancy remains, between Aramaic yeshuuʕ [consonantal y-sh-w-ʕ] and Arabic ʕiisa [consonantal ʕ-y-s-alef].]