| Name | Role | Place | Source | |
|---|---|---|---|---|
| Albert Louis Sys | Deceased | 1976 | Paris | Civil registration deaths |
| Albert Louis Sys | Deceased | 1976 | Paris | Civil registration deaths |
| Bernard Louis Henri Sys | Deceased | 2014 | Laventie | Civil registration deaths |
| Bernard Louis Henri Sys | Deceased | 2014 | Laventie | Civil registration deaths |
| Charles Louis Sys | Partner | 1885 | Brugge | Civil registration deaths |
| Louis Joseph Antoon Sys | Deceased | 1996 | Oostende, Leffinge | Rouwbrieven |
| Louis Philippe Henri Sys | Deceased | 1995 | Bailleul | Civil registration deaths |
| Louis Philippe Henri Sys | Deceased | 1995 | Bailleul | Civil registration deaths |
| Louis Sys | Groom | 1879 | Brugge | Civil registration marriages |
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