Belgium
noun: Belgian(s)
adjective: Belgian
Belize
noun: Belizean(s)
adjective: Belizean
Benin
noun: Beninese (singular and plural)
adjective: Beninese
Bermuda
noun: Bermudian(s)
adjective: Bermudian
Bhutan
noun: Bhutanese (singular and plural)
adjective: Bhutanese
Bolivia
noun: Bolivian(s)
adjective: Bolivian
Bosnia and Herzegovina
noun: Bosnian(s)
adjective: Bosnian
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