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

Marshall Islands
noun: Marshallese (singular and plural)
adjective: Marshallese

Mauritania
noun: Mauritanian(s)
adjective: Mauritanian

Mauritius
noun: Mauritian(s)
adjective: Mauritian

Mayotte
noun: Mahorais (singular and plural)
adjective: Mahoran

Mexico
noun: Mexican(s)
adjective: Mexican