Which group of people first called spiders arachnid?

The ancient Greeks, which used the story of Arachne to inspire the name. Basically the goddess Athena got mad at arachne for doing better art than her. She ordered a competition. Whoever made better art won. Long story short, Arachne wove a better tapestry than Athena, and in rage, Athena turned Arachne into a spider. Thus, inspiring the name: "Arachnid"