Arab Trick Makers, Saudi Arabia

If the diverse Arab pan-ethnicity is regarded as a single ethnic group, then it constitutes one of the world's largest after Han Chinese.
Etymology
The earliest documented use of the word "Arab" to refer to a people appears in the Monolith Inscription, an Akkadian language record of the 9th century BC Assyrian Conquest of Syria (Arabs had formed part of a coalition of forces opposed to Assyria). 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 ʕarab" (ar-ba-a-a being an adjectival nisba of the noun ʕarab).