God Seth was one of the main deities in the Egyptian pantheon. He was the manifestation of evil, chaos and confusion. He was the lord of Upper Egypt and the Eastern deserts. His birthday was always regarded as an unlucky day in the Egyptian calendar. About 30 spells in Coffin Texts replaced Seth's name with wDa and some even add wDa sign at the end of Seth's name as a determinative. As for wDa it was known since the Old Kingdom. It has different meanings like to judge, cut, split and to open. The research will try to investigate why wDa used to express Seth in Coffin Texts.  If there any kind of relation between them depending on Coffin Texts spells. Was wDa a title for Seth or a representation for him? The research will be divided into an introduction followed by the CT spells. Then the results and conclusion that will extract the relations between wDa and God Seth in Middle Kingdom Coffin Texts.