Its not all about that alone...its actually more specifically a re-defining of the Jewish Passover by the early Christians who were Jewish (later exported by Paul and others through the Roman world). And outside of one obscure Germanic inter-relation that according to actual historical texts (at least so far as Ive been able to find at this point) is not a direct adaptation of a pagan ritual in any way so much as Saxon peoples associating the word Easter with one of their already "old gods" at the time from the 800's.
http://en.wikipedia.org/wiki/Easter Not a bad layman's reference here btw.