Eunice Xash-wee-tes-na Henry Bommelyn (February 6, 1927 – April 23, 2012) was an American Tolowa cultural advocate, Tolowa language proponent, and tribal historian.
Bommelyn was the last living person to speak Tolowa as a native first language; Bommelyn led the effort to revive fluency and teach the language.
She uncovered and recorded the genealogy of the Tolowa from the present to the 1790s.
Her genealogical records are used to determine the membership and enrollment of the Smith River Rancheria, the federally recognized tribe of Tolowa people in Del Norte County, California.
Bommelyn was the mother of Loren Bommelyn, a ceremonial leader and basket weaver.