Leontine
| Name | Leontine |
| Type | Sailing vessel |
| GRT | 201 tons |
| Country |  French |
| Built | |
| Builder | |
| Operator | Cotton, St. Nazaire |
| History | Wooden brigantine previously known as Clio. Origin of vessel not known. Previously owned by A. Kohler & Co., St. Brieuc. |
U-boat attacks on Sailing vessel Leontine
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 25 Mar 1917 | UC 36 (Gustav Buch) | Sunk | Shelled and scuttled 5 miles S of Ile de Groix | 6 |
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