Madagascar
noun: Malagasy (singular and plural)
adjective: Malagasy
Malawi
noun: Malawian(s)
adjective: Malawian
Malaysia
noun: Malaysian(s)
adjective: Malaysian
Maldives
noun: Maldivian(s)
adjective: Maldivian
Mali
noun: Malian(s)
adjective: Malian
Malta
noun: Maltese (singular and plural)
adjective: Maltese
Man, Isle of
noun: Manxman (men), Manxwoman (women)
adjective: Manx
Marshall Islands
noun: Marshallese (singular and plural)
adjective: Marshallese
Martinique
noun: Martiniquais (singular and plural)
adjective: Martiniquais
Mauritania
noun: Mauritanian(s)
adjective: Mauritanian