Lynceus was the name of a son of Aegyptus. When Danaüs' daughters killed all his brothers, his bride, Hypermestra, helped him to escape. He became king of Argos and was succeeded to the throne by his son Abas. Another Lynceus was the inseparable brother of Idas, the son of Aphareus and Arene.

The name means 'lynx-like', and in particular 'lynx-eyed', from lynx, lyncos, 'lynx'. The second Lynceus was reputed to have vision so sharp that he could see what was hidden in the earth. In the case of the first Lynceus, the name is apparently a propitious one. We are not told that he escaped because of good sight or even foresight.