| Nom courant | Pays | Diocèse | Fondation | |
|---|---|---|---|---|
| Liessies |  | Cambrai | ~ 764 | |
| Lobbes |  | Cambrai | 660 - 670 | |
| Lonnig |  | Trier | av. 1120 | |
| Lousberg, Salvatorberg | | Liège | av. 1200 | |
| Machabäerkloster | | Köln | ~ 1056 - 1075 | |
| Machern | | Trier | ~ 1100 - ~ 1200 | |
| Malmedy | | Köln | ~ 650 | |
| Malonne | | Liège | ~ 600 - ~ 700 | |
| Maria Laach | | Trier | 1093 ? | |
| Maria Martental | | Trier | av. 1141 | |
| Mariaroth | | Trier | 1131 | |
| Marienberg | | Trier | 1120 | |
| Marienburg | | Trier | 1142 | |
| Mariengraden, S. Maria Graden | | Köln | 1052 - 1057 | |
| Marienthal | | Köln | 1136 - 1140 | |
| Marmoutier, Maursmünster | | Strasbourg | ~ 724 | |
| Maroilles | | Cambrai | 650 - 660 | |
| Masevaux, Masmünster | | Basel | ~ 728 | |
| Maubeuge | | Cambrai | 660 - 665 | |
| Mecheln, Malines | | Cambrai | av. 870 | |
| Meer | | Köln | 1166 | |
| Meerbeke | | Cambrai | av. 870 | |
| Merzig | | Trier | 1152 | |
| Mettlach | | Trier | ~ 690 - 705 | |
| Millen | | Liège | 1121 - 1126 |
