1) King in Greek mythology 2) Lodestone, to Cicero 3) Mythological Greek character 
[comic poet] Magnes (Greek: Μάγνης) was an Athenian comic poet of the 5th century BC. Magnes and his contemporary Chionides are the earliest comic poets for whom victories are recorded in the literary competition of the Dionysia festival. Titles of his comedies: ...[mythology] In Greek mythology, Magnes was a name attributed to two men. ...
• (n.) Magnet.
Mag'nes noun [ Latin ] Magnet. [ Obsolete] Spenser.