Renya is a name. Notable people with the name include: Given name Renya Mutaguchi (1888–1966), Japanese military officer Renya K. Ramirez (born 1959), Ho-Chunk American anthropologist, author, and Native feminist Fictional characters , a mysterious character in Case Closed (Detective Conan) Surname Jimmie V. Reyna (born 1952), American lawyer Japanese masculine given names