People of a different language
Chyenne is a spelling variant of Cheyenne, derived from the Dakota Sioux word 'shaiyena'. It was used by the Sioux to describe the Algonquian-speaking Cheyenne people, literally translating to 'speakers of a foreign language'.
Less common today
Chyenne isn't in the latest US Top 1000. It last peaked at #1,463 in 1996.
US births per 5-year period, 1990βpresent (SSA data).