Cupid is the son of Venus and the god of Love; in Latin he is called Amor, and in Greek, Eros. He is usually shown as a winged child. His attributes are a bow, arrow and quiver. Those hit by his arrows become lovers.
He often does not play an active part when pictorially represented, but is included to signify the importance of love to the major narrative shown.
Specific stories which relate to him include The Education of Cupid (see 'The School of Love' by Correggio), Cupid Stung (see 'Cupid complaining to Venus' by Cranach), and Cupid and Psyche (see Claude's 'Enchanted Castle' ).