Definition of "Kaw"

In the winter of 1866 the Cheyennes stole forty-two horses from a Kaw hunting party on the upper Arkansas, and following a murder of a Kaw herder at a buffalo camp near Fort Zarah a year later, the Kaws attacked a Cheyenne encampment[.]

2004, R. David Edmunds, The New Warriors: Native American Leaders Since 1900, page 20