Tonya Gonnella Frichner, a lawyer and professor from upstate New York who became a global voice for Native Americans in forging common ground with the world’s indigenous peoples, died on Feb. 14 at her home in Union City, N.J. She was 67.

Her husband, Herbert Frichner, said the cause was breast cancer.

The niece of a chief of the Onondaga Nation of the Iroquois Confederacy, Ms. Frichner founded the American Indian Law Alliance and served as North American regional representative to the United Nations Permanent Forum on Indigenous Issues.

“Indigenous peoples all speak many different languages, but in our meetings, we are speaking one language,” Ban Ki-moon, the United Nations secretary general, quoted her saying in September. “Our relationship to Mother Earth is identical.”

Ms. Frichner’s agenda included opposition to the Atlanta Braves fans’ celebratory tomahawk chop and to the natural gas drilling technology known as hydrofracking, which she said would have a disproportionate environmental effect on Native Americans and other minority groups.