In Welsh, Easter is called Y Pasg and, along with the French and Spanish words for Easter, probably comes from the Hebrew, Pesach, or Passover.  The English word Easter probably comes from the Goddess Ostara or Eostra, Saxon Goddess of the New Year.

Eostra was associated with the Hare, symbol of fertility and multiplication.  This is the origins of the Easter Bunny.

Hot crossed buns, spicy pastries marked with a white cross, are traditional on Good Friday although they may predate the modern Christian festival.  Similar buns were eaten at the Spring Equinox (20 Mar. this year), the arms of the cross signifying the seasons.  Other representations of the seasonal wheel are still to be found, roadside crosses which pre-date Christianity.

It was also traditional to plant parsley at this time to protect the slow-germanating seeds from the Devil's influence.

Weddings performed on Easter Sunday were believed to be doubly good fortune for the bride and groom.

As ever, my information comes from Y Drych, the column Cymru'r Werin: O Fis i Fis by Tecwyn Vaughan Jones