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| Demetrius of Montferrat | |
|---|---|
| King of Thessalonica | |
| Reign | 1207–1224 |
| Predecessor | Boniface I, Marquis of Montferrat |
| Successor | Conquered by Theodore Komnenos Doukas |
| Born | 1205 |
| Died | 1230 Amalfi |
| House | Aleramici |
| Father | Boniface I, Marquis of Montferrat |
| Mother | Margaret of Hungary |
Demetrius or Demetrios of Montferrat (Italian: Demetrio di Monferrato; Greek: Δημήτριος Μομφερρατικός, Dēmētrios Momferratikos; 1205–1230) was King of Thessalonica from 1207 to 1224.