Gatchalian is a Filipino surname (origin Gat Salian or Gatsalian i.e. Don Salian, a Tagalog chief) that may refer to the following people: C. E. Gatchalian (born 1974), Canadian playwright Rex Gatchalian (born 1979), Filipino politician Wes Gatchalian (born 1980), Filipino politician, brother of Rex Win Gatchalian (born 1974), Filipino politician and businessman, brother of Rex and Wes