The Norse Goddess Idun
The once harsh winter winds transform to gentle breezes. Daffodils, Crocus and Tulips push through the newly thawed earth, barren trees begin to bud, animals are birthing their young, and the spring peepers serenade us with their throaty song. To this harmonious wonder we honor Idun.
Idun, “She who renews”, is known as the goddess of spring, eternal youth, health and life. It is said that she had no birth and is destined to never know death. At times she is known as a fair maiden, soft and delicate, and at others, sturdy and hard working. She is charged with tending the sacred orchard from which all fruits stem, blessing health and longevity for all who partake.
http://paganpages.org/content/2012/03/musings-from-the-mossy-trail-7/
= new reply since forum marked as read
Frankly, I was hoping Tyrs would step in... Here is what I found for you:
In Norse mythology, Iðunn is a goddess associated with apples and youth. Iðunn is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson. In both sources, she is described as the wife of the skaldic god Bragi, and in the Prose Edda, also as a keeper of apples and granter of eternal youthfulness.
The Prose Edda relates that Loki was once forced by the jötunn Þjazi to lure Iðunn out of Asgard and into a wood, promising her interesting apples. Þjazi, in the form of an eagle, snatches Iðunn from the wood and takes her to his home. Iðunn's absence causes the gods to grow old and gray, and they realize that Loki is responsible for her disappearance. Loki promises to return her and, in the form of a falcon, finds her alone at Þjazi's home. He turns her into a nut and takes her back to Asgard. After Þjazi finds that Iðunn is gone, he turns into an eagle and furiously chases after Loki. The gods build a pyre in Asgard and, after a sudden stop by Loki, Þjazi's feathers catch fire, he falls, and the gods kill him.
http://en.wikipedia.org/wiki/I%C3%B0unn
Idun, also spelled Idunn, or Iduna, in Norse mythology, the goddess of spring or rejuvenation and the wife of Bragi, the god of poetry. She was the keeper of the magic apples of immortality, which the gods must eat to preserve their youth.
http://www.britannica.com/EBchecked/topic/282103/Idun
Iðunn (romanized "Idun"
is one of the goddesses of the Norse pantheon. She is best known in two unrelated roles: as the wife of Bragi (the god of poetry) and as keeper of the golden apples of immortality (which maintain the youth and vitality of the Aesir).[1]
http://www.newworldencyclopedia.org/entry/Idun
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My experience is that when you are calling a Goddess or God and you have True Love in your Heart, then They will hear you. And They will react to you. I hope this helps. icymist
Been having worse than normal Migraines the last few days, limiting my computer time. 
I could be wrong (language is not my strong suit, but I'm trying 
) but I think the 'I' is pronounced like the 'ea' in eat and the 'u' like the 'u' in True. That is from my limited knowledge of Norwegian.
Old Norse is a bit more like Icelandic. There the 'I' ought to be same. My Beginner's Icelandic book has 'u' listed as "like the French u as in tu". (I think that means it is more like the 'u' in hundred, but again my lang skills suck)
Personally I like the sound of Idun with I as 'ea' and the 'u' as in hundred, but then again 'u' as in true isn't bad either.
I doubt she would be offended if you use the version that sounds better to your ears. 