| Name | Role | Place | Source | |
|---|---|---|---|---|
| John Cockerill | Decorated | 's-Gravenhage | Registration honors | |
| John Cockerill | Witness | 1834 | Sint-Joost-ten-Node | Civil registration marriages |
| John Cockerill Leslie Alexander | Deceased | 1860 | Liège | Civil registration deaths |
| John Cockerill Leslie Aléxander | Child | 1835 | Liège | Civil registration births |
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