That's a misunderstanding related to the fact that in a few parts of Europe the Spring-related word became commonly used to refer to the Christian feast. In most languages of Europe, the name for the Christian feast is derived from the Latin paschalis or the Greek pascha, in turn derived from the Hebrew pesah.

See:

https://www.etymonline.com/word/paschal

https://www.etymonline.com/word/Easter?ref=etymonline_crossr...