These are the Della Roccas and Dellaroccas found so far in the 1901 UK Census (online version)... can anyone link to them..?

Forename Surname Age Where Born Admin County Civil Parish Occupation

Fredk Dellarocca 5M London Brixton London Lambeth
Fredk Dellarocca 21 London Brixton London Lambeth General Labourer
Gladys Dellarocca 1 London Brixton London Lambeth
Maud Dellarocca 20 London Peckham London Lambeth

Albert Della Rocca 28 London Lambeth London Newington Builders Labourer
Charles Della Rocca 1 London Clapham London Clapham
Charles Della Rocca 24 London Lambeth London Clapham Labourer Builder
$*&%! Della Rocca 24 London Lambeth London Clapham

Jame Della Rocca 1 London Newington London Newington
Mary Della Rocca 22 Middx Hendon London Newington

Maud Della Rocca 3 London Lambeth London Clapham