M
- Malphas (Christian demonology)
- Mammon (Christian demonology)
- Mara (Buddhist mythology)
- Maricha(Hindu mythology)
- Marax/Morax/Foraii (Christian demonology)
- Marbas (Christian demonology)
- Marchosias (Christian demonology)
- Masih ad-Dajjal/Ad-Dajjal/Dajjal (Islamic eschatology)
- Mastema (Jewish demonology)
- Medusa (Greek mythology)
- Melchiresa / Melki-resha (Jewish mythology)
- Mephistopheles (Christian folklore, German folklore)
- Merihem (Christian demonology)
- Moloch (Christian demonology)
- Murmur (Christian demonology)
Read more about this topic: List Of Theological Demons