Other ancient Greek historians like Agatharchides, Diodorus Siculus and Strabo mention Arabs living in Mesopotamia (along the Euphrates), in Egypt (the Sinai and the Red Sea), southern Jordan (the Nabataeans), the Syrian steppe and in eastern Arabia (the people of Gerrha).
The most popular Arab account holds that the word "Arab" came from an eponymous father called Ya'rub who was supposedly the first to speak Arabic.Abu Muhammad al-Hasan al-Hamdani had another view; he states that Arabs were called Gharab ("West") by Mesopotamians because Bedouins originally resided to the west of Mesopotamia; the term was then corrupted into "Arab".This was one of the largest land empires in history.Today, Arabs primarily inhabit the 22 Arab states within the Arab League: Algeria, Bahrain, Comoros, Djibouti, Egypt, Iraq, Jordan, Kuwait, Lebanon, Libya, Mauritania, Morocco, Oman, Palestine, Qatar, Saudi Arabia, Somalia, Sudan, Syria, Tunisia, United Arab Emirates and Yemen.Other smaller minority religions are followed, such as the Bahá'í Faith, Sabianism, Bábism and Mandaeism. Listed among the booty captured by the army of king Shalmaneser III of Assyria in the Battle of Qarqar are 1000 camels of "Gi-in-di-bu'u the ar-ba-a-a" or "[the man] Gindibu belonging to the Arab (ar-ba-a-a being an adjectival nisba of the noun ʿarab The oldest surviving indication of an Arab national identity is an inscription made in an archaic form of Arabic in 328 using the Nabataean alphabet, which refers to Imru' al-Qays ibn 'Amr as "King of all the Arabs".
Arabs have greatly influenced and contributed to diverse fields, notably the arts and architecture, language, philosophy, mythology, ethics, literature, politics, business, music, dance, cinema, medicine, science and technology Arabic epitaph of Imru' al-Qais, son of 'Amr, king of all the Arabs", inscribed in Nabataean script. Herodotus refers to the Arabs in the Sinai, southern Palestine, and the frankincense region (Southern Arabia).
Arab tribes, most notably the Ghassanids and Lakhmids, begin to appear in the southern Syrian Desert from the mid 3rd century CE onward, during the mid to later stages of the Roman and Sasanian empires.
Before the expansion of the Rashidun Caliphate (632–661), "Arab" referred to any of the largely nomadic and settled Semitic people from the Arabian Peninsula, Syrian Desert, North and Lower Mesopotamia.
His book, Jamharat al-Nasab ("The Abundance of Kinship"), seems to posit that the people known as 'Arabs' (of his time) were all descendants of Ishmael.
Of the names of the sons of Ishmael the names "Nabat, Kedar, Abdeel, Dumah, Massa, and Teman" were mentioned in the Assyrian Royal Inscriptions as tribes of the Ishmaelites.
The Christians of Iberia used the term Moor to describe all the Arabs and Muslims of that time.