Botswana: noun: Motswana (singular), Batswana (plural)
adjective: Motswana (singular), Batswana (plural)
Brazil: noun: Brazilian(s)
adjective: Brazilian
British Virgin Islands: noun: British Virgin Islander(s)
adjective: British Virgin Islander
Brunei: noun: Bruneian(s)
adjective: Bruneian
Bulgaria: noun: Bulgarian(s)
adjective: Bulgarian