Alfonso
| Name | Alfonso |
| Type | Sailing vessel |
| GRT | 15 tons |
| Country |  Italian |
| Built | |
| Builder | |
| Operator | |
| History |
U-boat attacks on Sailing vessel Alfonso
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 9 Aug 1917 | UC 35 (Hans Paul Korsch) | Sunk | Mediterranean | 37.25N, 12.05E |
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