Help identifying the artist initials on this squash blossom necklace

I have come across a squash blossom necklace that I’m trying to find the artist name.I am pretty sure that it is Navajo made with the initials GD or DG on the back. Any help would be very appreciated. Thank you!

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found nothing in the 5th edition and it looks like it was a “D” 1st
only other close match found


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Thank you very much Steve!