| Place name (English): | Østerholm Castle |
| Place name (local language): | Østerholm Slot |
| Place name (alt. local language): | Ny Helvedgård |
| Place name (older spelling): | |
| Place name (other common spelling/language): | |
| Place type: | building |
| Is in the area of: | Østerholm |
| Note: |
| 1 | Elisabeth von Braunschweig-Grubenhagen (20 March 1550-11 February 1585), parents: Ernst V and Margareta von Pommern |