According to wikipedia:
In Greek mythology, Eros (UK: /ˈɪərɒs, ˈɛrɒs/, US: /ˈɛrɒs, ˈɛroʊs/;[4]Ancient Greek: Ἔρως, romanized: Érōs, lit. ‘Love, Desire’) is the Greek god of love and sex. His Roman counterpart was Cupid (“desire”).[5] In the earliest account, he is a primordial god, while in later accounts he is described as one of the children of Aphrodite and Ares and, with some of his siblings, was one of the Erotes, a group of winged love gods.
The Greek ἔρως, meaning ‘desire’, comes from ἔραμαι ‘to desire, love’, of uncertain etymology. R. S. P. Beekes has suggested a Pre-Greek origin.[6]
According to Hesiod‘s Theogony (c. 700 BC), one of the most ancient of all Greek sources, Eros (the god of love) was the fourth god to come into existence, coming after Chaos, Gaia (the Earth), and Tartarus (the abyss).[14]
エロース（古希: Ἔρως，Erōs）は、ギリシア神話に登場する恋心と性愛を司る神である。ギリシア語で性的な愛や情熱を意味する動詞｢ἔραμαι｣が普通名詞形に変化､神格化された概念である。日本語では長母音を省略してエロスとも呼ぶ。
以上、wikipediaから。