Hesperus

In Greek mythology, Hesperus (Greek Ἓσπερος Hesperos) is the Evening Star, the planet Venus in the evening. He is the son of the dawn goddess Eos (Roman Aurora) and is the brother of Eosphorus (also called Phosphorus, and Lucifer), the son of the morning. Hesperus' Roman equivalent is Vesper (cf. "evening", "supper", "evening star", "west"). Hesperus' father was Cephalus, a mortal, while Eosphoros' was the star god Astraios.

Read more about Hesperus:  Variant Names, "Hesperus Is Phosphorus"