Inonesia is an archipelago of over 17,000 islands, only 6,000 of which are inhabited, that extends in an arc along the equator. It is the fourth most populous nation in the world (about 242 million) comprising about 365 tribal-ethnic groups, making it unrivaled in terms of ethnic, religious, and linguistic diversity. Their naming customs and the use of names match this polycultural, polyglot environment.