PRONUNCIATION: HOW-suh LOCATION: Hausaland in West Africa (northwestern Nigeria and in adjoining southern Niger) POPULATION: More than 20 million LANGUAGE: Hausa; Arabic; French or English RELIGION: Islam; native cults The Hausa, numbering more than 20 million, are the largest ethnic group in west Africa. They are widely distributed geographically and have intermingled with many different peoples. Islam arrived in the area...