Venus and Aphrodite are generally thought of as the same goddess in different guises. They share the symbols of white doves and red roses and are usually portrayed as the Queen of Heaven, with an aureole or nimbus—a halo—and a crescent moon. They often appear with an infant son—an early Madonna figure.
http://www.vision.org/visionmedia/biography/history-cupid-valentines/26221.aspx