"Form of Cheyenne"
The name Cheynne is commonly a female name from the "Native American" origin.
Cheynne is a respelling of Cheyenne, the English name of the Cheyenne people of the Great Plains and of the capital city of Wyoming. The spelling drops one of the doubled letters in Cheyenne and adds nothing new: it carries no separate meaning or root of its own.
Cheyenne means "An Algonquian tribe of the Great Plains. Capital city of Wyoming.".
The pronunciation of Cheynne is shy-EN.