"Blend of Ty and Shawn"
The name Tyshun is commonly a male name from the "American" origin.
Tyshun is a modern American coinage built from two name parts: the Ty- element seen in names such as Tyler and Tyrone, and the -shun ending, a phonetic spelling of Shawn. Names assembled the same way include Tyshawn and Tayshaun, and Tyshun is best described as a spelling of that group rather than as a name with an inherited meaning. It has no recorded history before its first appearance in United States birth records in 1988.
The pronunciation of Tyshun is TY-shun.