Here is the Origins if it is from German Ostara http://bellejar.ca/2013/03/28/easter-is-not-named-after-ishtar-and-other-truths-i-have-to-tell-you/
Actually, according to Jacob Grimm’s Deutsche Mythologie, which he wrote after journeying across Germany and recording its oral mythological traditions, the idea of resurrection was part and parcel of celebrating the goddess Ostara:
“Ostara, Eástre seems therefore to have been the divinity of the radiant dawn, of upspringing light, a spectacle that brings joy and blessing, whose meaning could be easily adapted by the resurrection-day of the christian’s God. Bonfires were lighted at Easter and according to popular belief of long standing, the moment the sun rises on Easter Sunday morning, he gives three joyful leaps, he dances for joy … Water drawn on the Easter morning is, like that at Christmas, holy and healing … here also heathen notions seems to have grafted themselves on great christian festivals. Maidens clothed in white, who at Easter, at the season of returning spring, show themselves in clefts of the rock and on mountains, are suggestive of the ancient goddess.”
Spring is a sort of resurrection after all, with the land coming back to life after lying dead and bare during the winter months. To say that ancient peoples thought otherwise is foolish, naïve and downright uninformed. Many, many pagan celebrations centre around the return of light and the rebirth of the land; these ideas are not new themes in the slightest.
And yes, rabbits and eggs are fertility symbols, and they are, in fact, associated with Eostre.