Marthe Yvonne
| Name | Marthe Yvonne |
| Type | Pilot boat |
| GRT | 30 tons |
| Country |  French |
| Built | |
| Builder | |
| Operator | |
| History |
U-boat attacks on Pilot boat Marthe Yvonne
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 14 Feb 1917 | UC 70 (Werner Fürbringer) | Sunk | 15 miles WSW La Coubre Pt | ||||
| 16/3/1917 per Bendert and Lloyd's | ||||||||
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