Where does “ⲡⲓⲗⲁⲧⲟⲥ” come from?

ⲡⲓⲗⲁⲧⲟⲥ (Coptic) comes from Koine Greek Πῑλᾶτος, from Latin Pīlātus, from Latin pīlum, from Proto-Italic pistlom, from Proto-Indo-European pis-tlo-, from Proto-Indo-European peys- — to grind, to crush.

ⲡⲓⲗⲁⲧⲟⲥ (Coptic): Pontius Pilate, the man who, according to the Bible, ordered the crucifixion of Jesus