Etymology tree
Pali veḷuriyabor.
Middle Persian bylwl (/*bēlūr/)
Classical Persian بِلّور (billōr)bor.
Arabic بِلَّوْر (billawr)bor.
Ottoman Turkish بللور (billur)
Turkish billur
Inherited from Ottoman Turkish بللور (billur), borrowed from Arabic بِلَّوْر (billawr), borrowed from Classical Persian بِلّور (billōr), from Middle Persian bylwl (/*bēlūr/), borrowed from Pali veḷuriya.