Moryllus or Moryllos was a town of ancient Macedonia, earlier assumed to be in the district of Anthemus, but now it is placed ,thanks to an inscription, in the interior Mygdonia or Crestonia

Crestonia

Crestonia was an ancient region immediately north of Mygdonia. The Echeidorus river, which flowed through Mygdonia into the Thermaic Gulf, had its source in Crestonia...

, near modern Ano Apostoli, Kilkis prefecture. The only attested citizens of Moryllus are two Delphic

Pythian Games

The Pythian Games were one of the four Panhellenic Games of Ancient Greece, a forerunner of the modern Olympic Games, held every four years at the sanctuary of Apollo at Delphi....

 theorodokoi

Theorodokoi

Theorodokoi in Ancient Greece were sacred envoy-receivers, whose duty was to host and assist the Theoroi "viewers" before Panhellenic Games and Festivals...

, Hadymos and Seleukos sons of Argaios (c.230-220 BC).