The cult was still thriving in the third century CE, when dedicatory stelae from Olbia refer to an Achilles Pontárchēs (Ποντάρχης, roughly "lord of the Sea," or "of the Pontus Euxinus"), who was invoked as a protector of the city of Olbia, venerated on par with Olympian gods such as the local Apollo Prostates, Hermes Agoraeus, or Poseidon.
ðə kˈʌlt wʌz stˈɪl θɹˈaɪvɪŋ ɪnðə θˈɜːd sˈɛntʃɚɹi sˌiːˈiː, wˌɛn dˈɛdɪkətˌoːɹi stˈɛliː fɹʌm ˈɑːlbiɚ ɹᵻfˈɜː tʊ ɐn ɐkˈɪliːz pˈɔntɑːɹtʃᵻz pˈaɪˈoʊmɪkɹənnjˈuːtˈaʊˈælfəɹˈoʊtʃˈaɪˈiːɾəsˈɪɡmə, ɹˈʌfli "lˈɔːɹd ʌvðə sˈiː," ɔːɹ "ʌvðə pˈɔntəs jˈuːksɪnəs", hˌuː wʌz ɪnvˈoʊkt æz ɐ pɹətˈɛktɚɹ ʌvðə sˈɪɾi ʌv ˈɑːlbiə, vˈɛnɚɹˌeɪɾᵻd ˌɔn pˈɑːɹ wɪð əlˈɪmpiən ɡˈɑːdz sˈʌtʃ ɐz ðə lˈoʊkəl ɐpˈɑːloʊ pɹˈɑːsteɪts, hˈɜːmiːz ˈæɡoːɹˌiːəs, ɔːɹ pəsˈaɪdən.