Why are Mackinaw city and Mackinac island spelled differently?

Mackinaw City and Mackinac Island are spelled differently due to their origins in the Native American language. The name "Mackinac" is derived from the Ojibwe Word "mckinaw," meaning "great turtle," while "Mackinaw" is a phonetic spelling that reflects the French influence in the region, where the "c" and "w" sounds are pronounced differently. The differing spellings help distinguish between the two locations, despite their close geographical relationship.