From one of those 'origins of Easter' pieces in the Sacramento Bee comes this passing claim:

In an Etruscan tomb, in what is now Italy, a painting was discovered depicting a man lying on a couch holding an egg, she says.

"It's a symbol of death and rebirth," she says.

... and here it is (from the Tomb of the Lioness). I don't have time to critically read this essay on the role of the egg in Etruscan religion ...