Siefredus of Northumbria
| Siefredus | |
|---|---|
| King of Northumbria | |
| Reign | c. 895–900 |
| Predecessor | Guthfrith |
| Successor | Cnut |
| Old Norse | Sigfrøðr |
Siefredus (Old Norse: Sigfrøðr) was a Norse King of Northumbria. Numismatic evidence suggests he ruled from around 895 until 900, succeeding Guthfrith.