Sauk

[sawk] /sɔk/
noun, plural Sauks (especially collectively) Sauk.
1.
a member of a North American Indian people formerly of Wisconsin and Iowa, now living mostly in Oklahoma.
2.
the dialect of the Fox language spoken by the Sauk.
Also, Sac.
Word Origin and History for Sauk

midwestern U.S. Indian tribe, 1722, alternative writing of Sac.

southern Coastal Salishan group of Native Americans, from a native Lushootseed name, probably folk-etymologized by influence of Sauk (1).