When was Venus the god born?
The ancient myths have no chronology.
According to the website http://www.geocities.com/heartland/lake/3483/venus.html Venus was born of the Sea and the Sky. Her mortal born son was Aeneas. She was married to the graceless and lame Vulcan, the god of fire. Her true love was Mars , the god of war. Their child was the beautiful goddess Harmonia.