1861 Census, St Mary Abbott, Kensington, Middlesex 18 William Street (RG9/17 101/7)
| William TREBY | Head | Mar | 33 | Cordwainer | Somersetshire Taunton |
| Mary do | Wife | Mar | 30 | | Middlesex Kensington |
| Samuel " | Son | | 7 | | Somersetshire Taunton |
| William " | " | | 4 | | Middlesex Kensington |
| James " | " | | 3 Month | | " " |
1871 Census, Kensington, Middlesex William Street (RG10/33 110/18)
| William TREBY | Head | Mar | 44 | Shoemaker | Somerset Taunton |
| Mary do | Wife | Mar | 41 | | Middx Nottinghill |
| Samuel do | Son | | 18 | | Somerset Taunton |
| William do | Son | | 15 | Scholar | Middx Nottinghill |
| Frederick do | Son | | 7 | | do do |
| Edwin do | Son | | 5 | | do do |
| Thomas do | Son | | 2 | | do do |
| Charles do | Son | | 1 Mo | | do do |
1881 Census, St George Campden Hill, Kensington, Middlesex 17 William Street (RG11/26 93/25 & 93/26)
| William TREBY | Head | Mar | 53 | Cordwainer | Somerset Taunton |
| Mary do | Wife | Mar | 50 | | Middx Kensington |
| William do | Son | Unm | 24 | Lab | do do |
| Frederick do | do | | 17 | Milk Carrier | do do |
| Edwin do | do | | 15 | Bottle Washer | do do |
| Thomas TREBY | Son | | 12 | Scholar | Middx Kensington |
| Charles do | do | | 10 | do | do do |
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