Macau
noun: Chinese
adjective: Chinese

Macedonia
noun: Macedonian(s)
adjective: Macedonian

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

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

Mauritania
noun: Mauritanian(s)
adjective: Mauritanian