Tiyan is a city located in Guam.
The provided source material does not contain information regarding Tiyan, but instead describes the Ezhavas (also known as Thiyya or Tiyyar). The Ezhavas are a community originating from the Malabar region of Kerala, India. In the 2010s, they constituted approximately 23% of the population in that region and were reported to be the largest Hindu community there.