AE 1981 777

[Renatus]

Is it possible, that the greeks never adopted the roman term pilus and insisted to use the term triarius?

A tombstone from Apamea may help here. It is that of Baebius Severus, an immunis in the century of the pilus posterior of the 5th cohort of legio II Parthica and is bilingual, Latin and Greek. The Greek version of the centurion's title is πίλου ύστέρου, so pilus could be transliterated into Greek.