ALMOST THERE A-ZERS... RIDDLES I AND J ...

Hi, everyone.

Thank you all for your patience and sympathy about my lack of internet. It's amazing how much we rely on it for our daily lives ... ESPECIALLY as writers.

I have two more F/F riddles for you today. I and J. By tomorrow I hope to be caught up to everyone else.

Again, I would like to welcome ALL my friends new and faithful.

The I post is short and powerful. I hope you enjoy it. The J post is more riddle than F/F.

Have a great day! I hope to see you all tomorrow.

I am an enchantress, synonymous with beauty and intelligence. As I strolled the shores of ancient Greece, Poseidon himself fell under my charms.

For Millennia my daughters carrying my name captivated all who crossed their paths. Whether by dance, music, or poetry my talents filtered through their souls. 

I am, and always will be Isadora.

Both born in the twentieth century, two monumental talents influenced American culture with their music. 

Both voices led a generation.

Both shared the earth for a brief time.

Only one survived, her voice strong and clear as the ding of a crystal glass. However, the other’s haunting voice will live on forever.

Who can these ladies be?  

Your final clue: Both voices owned/own the initials J.J.

Please leave your guess in the comments.

Yesterday's answer was indeed the GOPHER....