[Olog-hai]

The final leader of the Beast is not relevant (or perhaps is relevant) to the fact that the Beast was around in Jesus’ day, and it was not related to what became the Islamic empire.

To assert that John converted a word whose writing would have derived from something he would have been familiar with (Syriac writing) into the Greek numeral chi-xi-stigma deliberately or even ignorantly, while specifically calling it a number, is to imply that God deceived John, or that John was a fool and God is a liar.

[Rurudyne]

As stated: the script looks like Greek letters which are associated with numbers.

Also, Islamic Arabic script as we are talking of here is not the same as Syriac. Many consider it to be derived from Nabatean instead. Even then the script does not look like either Syriac or Nanpbatean but has many stylistic differences no matter which it came from.

In short, it is a script that John would not have known.