Ah, by cross-referencing with the 1911 Free Index (where they are Dupry), I believe this is them in the 1901 census. James is using his 2nd forename of Thomas - does his occupation match your info?
1901 census of Rotherhithe, St Olave, Southwark - RG13/Piece 399 Folio 83 Page 30 @ 6, Littlington Street.
Thomas Du?b?ois 46 (matches age at 1918 death) born Marylebone: a Horsekeeper & Groom
Eliza Dubois 36 Wife born Berkshire, Reading
?Walter? Dubois 18 son born Kent, Dover: a Carman
Mary A Dubois 19 dau born Ireland
Georgina Dubois 16 dau Canterbury
John Dubois 12 son London, Battersea
Matilda Dubois 10 dau London, Borough
Lydia Dubois 8 dau Rotherhithe
Christopher Dubois 5 son ditto
Frederick Dubois 1 son ditto
Arthur Bodtin 46 Lodger / Boarder
Sarah Linford 52 ditto
From the kids PoBs, I wonder if James Thomas was an old soldier?
Given the oldest lad's PoB being Dover - this might be James/Thomas and Elizas Marriage?
Marriages Dec 1881
Dupoy James Dover 2a 1730
FOWLER John Henry Dover 2a 1730
SIMPSON Annie Stone Dover 2a 1730
Westall Eliza Dover 2a 1730