However, there is no conclusive connection I have found between the pagan goddess Ishtar and Easter. Neither have I found evidence that Ishtar was associated with eggs or rabbits as symbols. Ishtar’s sacred animal was the lion.
Ancient Persian celebration of god "Nowruz", from Zoroastrianism. Still celebrated in Iran, with painted eggs, at the spring Equinox.
Pysanky eggs from Ukraine, from prior to 10th century, made as offerings to the sun at the return of spring, to protect from evil and usher in a season of light.
Chinese deity "Pan Gu" started the universe by being born from an egg.
The Venerable Bede (673-735 AD) was fascinated by the dating of Easter, and he postulated in 'The Reckoning of Time' that the word "Easter" derived from an Anglo-Saxon goddess Eostre.
Author Jacob Grimm, of Grimm's fairy tales, suggested that eggs were a symbol of early European Paganism.
In Greek Orthodox Christianity, there is a legend that after Christ's death on the cross, Mary Magdalene went to the emperor of Rome, and told him of Jesus' resurrection. The emperor's response was along the lines of "Oh, yeah, right, and those eggs over there are red, too." Suddenly, the bowl of eggs turned red, and Mary Magdalene joyfully began preaching Christianity to the emperor.
The character of the "Easter bunny" first appeared in 16th-century German writings
Adolf Holtzmann in his book Deutsche Mythologie, "the Easter Hare is inexplicable to me, but probably the hare was the sacred animal of Ostara; just as there is a hare on the statue of Abnoba." Abnoba was a goddess of the Gauls (ancient Germans).
If I had to make a determination based on the small amount I have been reading... "Easter" seems to be more of an ancient Germanic term. And it does seem pagan, not Christian, and it concerns a celebration of the Spring Equinox. The germanic traditions include rabbits and eggs.