Not one of the saints listed (with the possible exception of S John of Damascus) could be considered ethnically Arab. And that includes St George of dragon fame. As [post=7593975]Ghosty[/post] pointed out earlier, they predate the Arab invasions. Given the name ascribed to S George’s mother (“Polychronia”) one would have to assume that she was of Hellenic extraction.
It seems to me that [post=7594116]Formosus[/post] is on the right track. One would best look for Antiochian (aka “Greek”) Orthodox or Melkite saints with births dating from after the Arab invasions. (NB: even all those would not be ethnically Arab, but some would qualify.) Prior to that time, along with the Bedouins in the Negev region and elsewhere, the northern extent of Arab settlement was Nabatea. It’s quite likely that some Nabateans, at least, became Christian.