"Many tribes of Shem escaped [Hyrkanian] captivity, and from pure-blooded Shemites, or Shemites mixed with Hyborian or Nordic blood, were descended the Arabs, Israelites, and other straighter-featured Semites." -- REH
Bedouins and other Arabs caused trouble for the Ottomans for centuries, right up through World War I. Howard owned an edition of Lawrence's Revolt In the Desert (as do I).
I'd say yes. The Zuagirs were REH's prehistoric version of the Arab Bedouin, though the name itself looks as if it was inspired by Tuaregs. And they harassed the Turanian Empire just as actual Bedouin harassed the Ottomans. REH's Turanians are pseudo-Ottomans even though the proper names are more often borrowed from Sassanid Persia, such as Yezdigerd and Shah Amurath … at least I think the latter is Persian, not Turkish. Ghaznavi, in "The Devil In Iron", has a Turkish sound, but Ghaznavi's master Jehangir, in the same story, again has a Persian name. Jehangir was the imperial name of a Mughal overlord, in our history, and it is Persian for "world conqueror."