Complex sentence: Tacitus G.46 On the other hand, the Bastarnae maintained a separate name-identity into the late 3rd century AD, perhaps implying retention of their distinctive ethno-linguistic heritage, at least until 300.
Split into simpler sentences: Tacitus G.46 On the other hand, the Bastarnae maintained a separate name-identity until ca. AD 300, probably implying retention of their distinctive ethno-linguistic heritage, at least until 300.