In Greek mythology, a people living on the coast of the Propontis
In Greek mythology, the Doliones (Ancient Greek: Δολίονες) or Dolionians were the people living on the coast of the Propontis (northwestern Asia Minor), visited by the Argonauts. They were ruled by Cyzicus, son of Aeneus and Aenete.
Mythology.
After the departure of the Argonauts in Lemnos, they came to the land of the Doliones of whom Cyzicus was the king. Cyzicus welcomed the Argonauts on their journey to Colchis and received them with generous hospitality. But after their departure, a storm drove them back to the Cyzicene coast at night. 
With neither the Argonauts nor King Cyzicus and the Doliones recognizing one another, each mistook the other as an enemy and battle ensued (according to Apollonius of Rhodes' "Argonautica" and Apollodorus' "Bibliotheca", the Doliones thought the returning Argonauts were a Pelasgian army who constantly harassed them). A fragment attributed to 4th century BCE historian Ephorus in the Scholia on Apollonius of Rhodes’ "Argonautica", however, named the Doliones a Pelasgian people. The Argonauts slew many natives, including King Cyzicus who was killed either by Jason or Heracles.