No one inventor gets credit for the wig. Wigs are one of those human inventions that appeared because people kept needing the same solution: protection, status, beauty, theater, and identity.
The earliest famous wig culture
Ancient Egypt is usually the place people name first. Egyptians used wigs for status, ceremony, sun protection, and grooming. Materials could include human hair, plant fibers, or animal hair depending on period and class.
Why wigs kept coming back
Wigs solved different problems in different eras. In Egypt they could signal rank. In Europe they became court fashion. In theater they helped build characters. Today they are used for beauty, medical hair loss, protective styling, cosplay, and convenience.
Bottom line
The wig was not invented by one person. It evolved across cultures, with ancient Egypt providing some of the best-known early examples.