Just wrote a hub showing many of the origins for the "Easter" celebration and its customs - dating back to ancient Babylon and also reflecting its later migration into Medieval European culture. Hope this is useful.
I've heard as I was a child that it comes from ancient pagans or pharaohs who had believed that rabbits had been symbols of fertility. Germans also associated the rabbit with Easter and may have done so as early as 1500 BC. According to the Germanic tradition, children would create nests out of girl’s bonnets and boy’s
caps in hopes the Easter hare would lay colorful eggs in the nests. The Easter hare became the Easter bunny by the 19th century
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