What Native American silversmith uses DS as a hallmark?

This is a quote I found at a website, it could be Darrell Sakeva... read on

"I'm guessing it's fairly modern and Hopi. The marks are similar to those used on Hopi pieces although my copy of Hopi silver, the history and hallmarks of Hopi silversmithing by Margaret Nickelson Wright does not list SD. Closest is DS (same letterform) for Darrell Sakeva from the Corn clan,
Shungopavi village who began working in 1993." Mystery Marks

It's william singer

I have a silver and Black stone... onyx or obsidian... bolo. The eagles head is the black stone. The mark on the back is:
J (some kind of corn/maize symbol) and an H. Letters are shaped into an oval around the symbol. Does anyone have a clue if this is mexican or native american silver maker?