| Matsuo Bashō | Japan | 1644–1694 | 1 |
| Matsuno Chikanobu | Japan | 1650 | 1 |
| Matsumura Keibun | Japan | 1779–1843 | 3 |
| Matsumura Goshun | Japan | 1752–1811 | 6 |
| Matías Moreno | Spain | 1840–1906 | 14 |
| Matías de Torres | Spain | 1635–1711 | 1 |
| Mathys Schoevaerdts | Habsburg Netherlands | 1660–1703 | 4 |
| Mathys Cock | Habsburg Netherlands | 1505–1548 | 1 |
| Mathilde Weil | United States | 1872–1918 | 1 |
| Mathilde Battenberg | Germany | 1878–1936 | 2 |
| Mathieu Le Nain | France | 1607–1677 | 3 |
| Mathieu Jacquet | France | 1545–1611 | 1 |
| Mathias Stomer | Dutch Republic | 1600–1660 | 23 |
| Mathias Stoltenberg | Norway | 1799–1871 | 1 |
| Mathias Nicolas Marie Vivier | France | 1788–1859 | 2 |
| Mathias Blumenthal | Norway | 1719–1763 | 3 |
| Mathew Brady Studio | — | — | 3 |
| Mathew B. Brady | United States | 1822–1896 | 12 |
| Mather Brown | United States | 1761–1831 | 12 |
| Mateo Gilarte | Crown of Aragon | 1629–1675 | 9 |
| Mateo Cerezo | Spain | 1637–1666 | 12 |
| Master of the Worcester Panel | Germany | 1400 | 2 |
| Master of the Washington Coronation | — | 1300–1400 | 1 |
| Master of the Virgo inter Virgines | — | 1401–1505 | 5 |
| Master of the Tiburtine Sibyl | Netherlands | 1475–1495 | 2 |
| Master of the Thenn Portraits | — | 1450–1600 | 1 |
| Master of the Stockholm Pietà | — | — | 1 |
| Master of the Starck Triptych | — | — | 3 |
| Master of the San Lucchese Altarpiece | — | — | 2 |
| Master of the Saint George Codex | — | 1400–1400 | 3 |
| Master of the Regular Canons' Altarpiece | Germany | 1425–1475 | 1 |
| Master of the Rebel Angels | — | 1400–1400 | 2 |
| Master of the Prodigal Son | Habsburg Netherlands | 1600 | 3 |
| Master of the Presentation of Christ | Austria | — | 1 |
| Master of the Playing Cards | Germany | — | 1 |
| Master of the Parement de Narbonne | France | 1361–1500 | 1 |
| Master of the Palazzo Venezia Madonna | — | — | 4 |
| Master of the Orléans Triptych | — | — | 1 |
| Master of the Oberaltaich Man of Sorrows | — | — | 1 |
| Master of the Murano Gradual | — | 1425–1475 | 1 |
| Master of the Munich Arrest of Christ | — | — | 1 |
| Master of the Morata Retable (Morata Master) | Spain | — | 1 |
| Master of the Monogram IDM | — | 1564–1635 | 2 |
| Master of the Miller Tondo | — | 1478–1530 | 2 |
| Master of the Medici Banquet Decanters | — | 1670 | 2 |
| Master of the Life of the Virgin | Germany | 1500–1500 | 10 |
| Master of the Life of Saint John the Baptist | — | 1250 | 1 |
| Master of the Legend Scenes | Germany | 1500 | 22 |
| Master of the Legend of Saint Lucy | Habsburg Netherlands | 1430–1506 | 5 |
| Master of the Legend of Saint Barbara | Kingdom of the Netherlands | 1470 | 3 |
| Master of the Lanckoronski Annunciation | — | — | 1 |
| Master of the Housebook | Holy Roman Empire | 1450–1500 | 5 |
| Master of the Holy Kinship the elder | Germany | 1400–1500 | 4 |
| Master of the High Altar of Saint Jacob's in Nuremberg | — | — | 1 |
| Master of the Griselda Legend | Republic of Siena | 1500 | 4 |
| Master of the Gathering of the Manna | — | 1500–1500 | 1 |
| Master of the Furies | — | 1505–1700 | 1 |
| Master of the Friedrich Altar of 1447 | — | — | 1 |
| Master of the Female Half-Lengths | Southern Netherlands | 1501–1501 | 21 |
| Master of the Embroidered Foliage | Southern Netherlands | 1450–1600 | 2 |