Where does “ꠍꠤꠞꠤꠀ” come from?

ꠍꠤꠞꠤꠀ (Sylheti) comes from Arabic سوريا, from Ancient Greek Συρία, from Ancient Greek Ἀσσυρία, from Akkadian Aššūrāyu, from Akkadian Aššūr — Assur.