Crew list of Ships hit by U-boats
Geert Wilhelmus van der Werf
Royal Dutch Navy. Dutch
| Born | 3 Feb 1914 | Amsterdam | |
| Died | 13 Nov 1942 | (28) |
Roster information listed for Geert Wilhelmus van der Werf
| Ship | Type | Rank / role | Attacked on | Boat | |
|---|---|---|---|---|---|
 | HNMS Isaac Sweers (G 83) | Destroyer | Kwartiermeester | 13 Nov 1942 (+) | U-431 |