| Place name (English): | Rydboholm Castle |
| Place name (local language): | Rydboholms slott |
| Place name (alt. local language): | |
| Place name (older spelling): | |
| Place name (other common spelling/language): | |
| Place type: | building |
| Is in the area of: | Österåker |
| Note: |
| 1 | Elsa Beata Brahe (31 August 1629-5 April 1653) |