| Sigfred and Halfdan | |
|---|---|
| King of the Danes | |
| Reign | c. 873 |
| Predecessor | Horik II |
| Successor | Helge |
| Born | 9th century Denmark |
| Died | 877 (?) and 891 (?) Irish Sea (?) and Leuven(?) |
| Dynasty | Lodbrok (?) |
| Father | unknown, possibly Ragnar Lodbrok |
| Religion | Norse paganism |
Sigfred and Halfdan were two brothers who figured as Kings of the Danes in 873. Little is known about them; they are the last Danish rulers recorded by contemporary sources before the 930s.