The word 'Easter' is only mentioned once in the KJV in Acts 12:4.
In the original Manuscripts which was written in greek for the New Testament. The word is 'pascha' - the passover.

The word pascha is written 28 other times in the New Testament and evertime it is translated into 'Passover'

There is no way you can translate pascha into easter. Easter should not even be in the bible.

Easter comes from perverted pagan fertility rituals, But some traditions of easter were allowed by christians when a large number pagans converted to christanity.