Crew list of Ships hit by U-boats
Johannes L. Mandemakers
Merchant Navy. Dutch
| Born | 1905 |
Roster information listed for Johannes L. Mandemakers
| Ship | Type | Rank / role | Attacked on | Boat | |
|---|---|---|---|---|---|
 | Crijnssen | Steam passenger ship | Baggage Master | 11 Jun 1942 | U-504 |
 | Lebore | Steam merchant | Shipwrecked | 14 Jun 1942 | U-172 |