Bunny
The Easter bunny is often considered a part of Easter because of the notable ability of bunnies to proliferate. However, there are roots back to the actual name of Easter. A goddess of fertility, Eostre, (who may have been one of the inspirations for the name Easter) is said to have been accompanied by a hare. Although many sources debate this connection. The tradition of the bunny was brought to the U.S. by German settlers to Pennsylvania.
Source: associatedcontent.com