The Roman goddess who inspired and guided Numa Pompilius, the successor of Romulus in the kingship of Rome. She is also regarded as his wife. They used to meet in a sacred grove in the midst of which a spring gushed forth and there she taught him wise legislation and the forms of public worship.

After his death in 673 BC she changed into a well in the forest of Aricia in Latium, which was dedicated to Diana. Egeria is one of the Camenae and was also worshipped as a goddess of birth.