What is "amarynthus"

Amarynthus was in Greek mythology a hunter of Artemis, from whom the town of Amarynthus in Euboea ( Stephanus of Byzantium says that it was Euboea itself) was believed to have derived its name. From this hero, or rather from the town of Amarynthus, Artemis derived the surname Amarynthia or Amarysia, under which she was worshipped there and also in Attica.