The origin of the name in no way detracts from the true meaning of what we now celebrate at Easter.
There we are - right on cue - a christian dictating to the rest of us what the
true meaning of Easter is.
News for you chum - while there are plenty of people who see Easter as a time to mark the purported resurrection of Jesus there are plenty of others who see is as a Spring festival. Neither has a monopoly on determining its 'true' meaning albeit those that see it as the celebration of Spring are being faithful to the origin of the name of the festival.
But if we are using the work
true - well perhaps we should use it properly - the definition being something which is in accordance with fact or reality.
So if we have two variant
true meanings of Easter namely:
A). Associated with an assertion that a person died and then became alive again - an assertion based on no evidence and which contradicts all we know about physiology
B). Association with a season where days get longer and a little warmer, where growth of plants re-emerges and many species start to breed.
Which of those better aligns with being in accordance with fact or reality AB?